Stable inhibitor on-line premixing device for urea production

Abstract

The present application relates to the technical field of urea production premixing, and specifically discloses a stable urea production inhibitor online premixing device, which comprises a pipeline and a dosing pipe, the pipeline is provided with a control assembly and an auxiliary assembly, and the pipeline comprises a feeding pipe, a discharging pipe, a first mixing pipe and a second mixing pipe; the control assembly is arranged on the feeding pipe; the auxiliary assembly comprises an intercepting box and a baffle, the intercepting box is located between the discharging pipe, the first mixing pipe and the second mixing pipe and communicates with the three pipes, the baffle is perpendicular to the end face of the discharging pipe, and the baffle is between the first mixing pipe and the second mixing pipe; the control assembly controls the solution to flow into the first mixing pipe and the second mixing pipe alternately, and the solution impacts the baffle to form a water hammer effect, so that the agglomerated materials contained in the solution are dispersed; the stable urea production inhibitor online premixing device has the effect of improving the solution mixing efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of urea production premixing, and in particular to an inhibitor online premixing device for stable urea production. BACKGROUND

[0002] Urea is a raw material with liquid nitrogen and carbon dioxide as the core, and is processed into products through four key links of raw material processing, high-pressure synthesis, product purification and granulation packaging. When processing urea, an inhibitor needs to be added to prevent urea decomposition and maintain the physical and chemical stability of the product. Generally, the inhibitor is added in the urea melting stage to pre-mix the two, and then it is discharged into the stirring tank for secondary mixing.

[0003] The patent document with publication number CN115738852B discloses a fluid mixing device, which comprises a main pipe, a stirring cavity and a filling pipe. The main pipe is used to inject a first fluid required to be mixed from its first end. The first fluid can flow from the first end of the main pipe to the second end of the main pipe. The stirring cavity is rotatably installed in the main pipe. A stirring cavity is formed in the stirring cavity. A through-hole is formed in the stirring cavity. The first end of the filling pipe extends into the stirring cavity. A second fluid required to be mixed can be injected into the stirring cavity from the first end of the filling pipe. The flow of the first fluid in the main pipe can drive the stirring cavity to rotate. When the first fluid and the second fluid need to be mixed, the first fluid is injected from the first end of the main pipe. The first fluid flows from the first end of the main pipe to the second end of the main pipe. At the same time, the second fluid required to be mixed is injected into the stirring cavity from the first end of the filling pipe. The flowing first fluid drives the stirring cavity to rotate, so that the first fluid and the second fluid are mixed.

[0004] However, the following problems still exist in this scheme. When urea and an inhibitor are pre-mixed, the molten urea is first introduced into the main pipe, and then the inhibitor is introduced into the main pipe through the filling pipe to mix the inhibitor with the molten urea, so that the two are molten and mixed. However, since the inhibitor is in powder form, when the inhibitor is added to the molten urea, it is easy to form suspended particles or agglomerated materials in the urea solution, which affects the mixing efficiency. SUMMARY

[0005] The present application provides an inhibitor online premixing device for stable urea production, which aims to solve the problem of affecting the mixing effect caused by the existence of agglomerated materials in the related art.

[0006] The present invention discloses an online premixing device for inhibitors in the production of stable urea, comprising a pipeline and a dosing pipe located on the pipeline. A control component and an auxiliary component are provided on the pipeline. The pipeline includes an inlet pipe and an outlet pipe, and a first mixing pipe and a second mixing pipe located between the inlet pipe and the outlet pipe and respectively connecting the two. The control component is located on the inlet pipe for controlling the connection between the inlet pipe and the first mixing pipe or the second mixing pipe. The auxiliary component includes an interception box and a baffle. The interception box is located between the outlet pipe, the first mixing pipe, and the second mixing pipe and is connected to all three. The baffle is perpendicular to the end face of the outlet pipe and is slidably disposed between the first mixing pipe and the second mixing pipe. The control component controls the solution to alternately flow into the first mixing pipe and the second mixing pipe, so that the solution alternately pushes the baffle to reciprocate within the interception box, and then enters the outlet pipe. Simultaneously, the solution impacts the baffle to create a water hammer effect, thereby breaking up any agglomerated materials contained in the solution.

[0007] The effect is that, by setting up a first mixing pipe and a second mixing pipe, and a baffle slidably disposed between them, the solution alternately flows through the first and second mixing pipes to the baffle, and impacts the baffle to create a water hammer effect, thereby breaking up the agglomerated materials contained in the solution. Specifically, the urea solution flows in the feed pipe, and the inhibitor is added into the feed pipe through the dosing pipe. The control component controls the solution to alternately enter the first and second mixing pipes. When passing through the first mixing pipe, the baffle moves closer to the second mixing pipe under the action of the solution. Then, the control component controls the solution to enter the second mixing pipe, causing the baffle to move in the opposite direction, thereby causing the baffle to move back and forth. When the solution changes its flow path, it will impact the baffle to create a water hammer effect, so as to break up the agglomerated materials, improve the premixing effect, and thus improve the subsequent mixing efficiency.

[0008] Preferably, a filter plate is provided at the connection between the interception box and the discharge pipe, and the side of the baffle slides against the filter plate to scrape off the clumps of material attached to the filter plate when the baffle moves.

[0009] Its effect is that when the solution passes through the filter plate, the filter plate can filter the residual agglomerated material in the solution. At the same time, when the baffle moves, it can scrape off the agglomerated material attached to the filter plate to ensure the filtration effect of the filter plate and reduce the phenomenon of filter plate clogging. At the same time, it intercepts the agglomerated material and assists in breaking it up under the action of water hammer effect, thereby improving the mixing efficiency of the two.

[0010] Preferably, the control assembly comprises a ball, a control member mounted on the feeding pipe, the ball is rotatably arranged between the feeding pipe, the first mixing pipe and the second mixing pipe, an output end of the control member is connected with the ball to drive the ball to rotate, a communication groove is formed through the ball, when two ends of the communication groove correspond to the feeding pipe and the first mixing pipe respectively, the solution enters the first mixing pipe, and when the two ends of the communication groove correspond to the feeding pipe and the second mixing pipe respectively, the solution enters the second mixing pipe.

[0011] The effect is that, by arranging the control member and the ball, the control member drives the ball to rotate, so as to drive the communication groove to correspond to the first mixing pipe or the second mixing pipe, thereby guiding the solution to enter the first mixing pipe or the second mixing pipe, adjusting the flow path of the solution, driving the baffle to move in different directions, and generating water hammer effect while adjusting the moving direction of the baffle, so as to crush the agglomerated material.

[0012] Preferably, the intercepting box is provided with a pressing part, the pressing part is located on both sides of the filter plate, and the baffle moves to abut against the pressing part to crush the agglomerated material scraped off from the filter plate.

[0013] The effect is that, after the baffle scrapes off the material on the filter plate, the scraped material is moved close to the pressing part, and the material between the baffle and the pressing part is crushed as the distance between the baffle and the pressing part gradually decreases, so as to be mixed subsequently.

[0014] Preferably, the baffle is provided with an elastic assembly, a plurality of clamping grooves are arranged on the inner wall of the intercepting box along the sliding direction of the baffle, the elastic assembly comprises a clamping block slidingly assembled on the baffle and an elastic member connecting the clamping block and the baffle, the elastic member is used to drive the clamping block to move and be buckled with the clamping groove, the clamping block is provided with guide inclined surfaces on both sides, the guide inclined surfaces abut against the inner wall of the clamping groove, the clamping block moves to be buckled with different clamping grooves through the guide inclined surfaces when the baffle moves, and the clamping block is separated from the clamping groove to compress the elastic member.

[0015] Preferably, the elastic assembly and the clamping groove are provided with two groups, and the two groups of elastic assemblies are arranged on opposite two sides of the baffle.

[0016] The effect is that, by arranging the elastic assembly, the resistance of the baffle during movement is increased, the speed of the baffle during movement is slowed down, and the water hammer effect is improved.

[0017] Preferably, the intercepting box is provided with a sensing member, the sensing member is used to detect whether the baffle abuts against the pressing part, the feeding pipe is provided with a controller, a control end of the controller is connected with the control member to control the rotating direction of the ball, a signal output end of the sensing member is electrically connected with a signal receiving end of the controller, the sensing member sends a signal to the controller when the baffle moves to cooperate with the pressing part, and the controller controls the ball to rotate through the control member.

[0018] Its effect lies in that the position of the baffle moving is detected through the setting of the inductor, so as to adjust the flow path of the solution in time according to the position of the detection plate, and then adjust the moving direction of the baffle after the baffle moves to the specified position, so as to drive the baffle to reciprocate in the intercepting box.

[0019] Preferably, the first mixing pipe and the second mixing pipe are provided with sealing rings near one end of the feeding pipe, and the inner side of the sealing ring is provided with a circular arc surface, which is in sliding abutment with the side surface of the ball.

[0020] Its effect lies in that the circular arc surface on the sealing ring is matched with the ball, so as to increase the contact area between the ball and the sealing ring, and then improve the sealing performance of the ball and the sealing ring.

[0021] Preferably, the first mixing pipe and the second mixing pipe each include a vertical part in communication with the intercepting box, and the center line of the vertical part is the same as the sliding direction of the baffle.

[0022] Its effect lies in that the vertical parts are arranged on the first mixing pipe and the second mixing pipe, and the line connecting the two vertical parts is perpendicular to the baffle, so that the solution can vertically impact the baffle and drive the baffle to move when entering the intercepting box, thereby improving the water hammer effect and more easily breaking the agglomerated materials in the solution.

[0023] Preferably, the baffle is in sliding abutment with the inner wall of the intercepting box, and the extrusion part is parallel to the baffle.

[0024] Its effect lies in that the baffle is arranged in sliding abutment with the inner wall of the intercepting box, and the extrusion part is parallel to the baffle, so that the contact area between the baffle and the extrusion part is increased when the baffle is close to the extrusion part and abuts against the extrusion part, thereby improving the extrusion effect of the baffle on the materials.

[0025] Beneficial effects:

[0026] 1. The first mixing pipe and the second mixing pipe are arranged, and the baffle is arranged between the first mixing pipe and the second mixing pipe, the control assembly controls the solution to flow alternately in the first mixing pipe and the second mixing pipe when the solution is pre-mixed, the baffle is driven to reciprocate between the first mixing pipe and the second mixing pipe while the solution alternately flows between the two and contacts the baffle, a water hammer effect is generated to break the agglomerated materials contained in the solution, the pre-mixing effect of the solution is improved, and the efficiency of secondary stirring and mixing is improved.

[0027] 2. By setting the filter plate at the end of the discharge pipe, the agglomerated material in the solution is intercepted by the filter plate when the solution is discharged, and the baffle is slidably abutted with the side surface of the filter plate, so that the impurities attached to the filter plate can be scraped off when the baffle reciprocates, thereby reducing the blocking phenomenon of the filter plate and ensuring the filtering effect of the filter plate. When the baffle reciprocates, the scraped material is moved close to the extrusion part, and as the distance between the baffle and the extrusion part gradually decreases, the agglomerated material is extruded and crushed by the cooperation of the baffle and the extrusion part, and the water hammer effect is used to mix the material with the solution, thereby improving the premixing effect of the solution.

[0028] 3. By setting the output end of the control member connected with the ball, and setting the communication groove on the ball, the ball is rotated by the control member, and the two ends of the communication groove are communicated with the feed pipe and the first mixing pipe or the two ends of the communication groove are communicated with the feed pipe and the second mixing pipe when the ball rotates, so as to guide the solution into the first mixing pipe or the second mixing pipe, push the baffle to move in the opposite direction, realize the reciprocating movement of the baffle, and then make the solution generate water hammer effect when entering the intercepting box, so as to assist in eliminating the agglomerated material contained in the solution. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is the overall structure schematic diagram of the present application.

[0030] Figure 2 It is the cross-sectional view of the pipeline in the present application.

[0031] Figure 3 It is Figure 2 the structure schematic diagram of A in the present application.

[0032] Figure 4 It is Figure 2 the structure schematic diagram of B in the present application.

[0033] Figure 5 It is the local explosion schematic diagram of the baffle and the filter plate in the present application.

[0034] Figure 6 It is the internal structure schematic diagram of the intercepting box in the present application.

[0035] Figure 7 It is Figure 6 the structure schematic diagram of C in the present application.

[0036] Figure 8 It is the structure schematic diagram of the extrusion part in the present application.

[0037] Figure 9 It is the local explosion schematic diagram of the ball and the sealing ring in the present application.

[0038] REFERENCE NUMERALS:

[0039] 1, pipe; 11, feed pipe; 12, discharge pipe; 13, first mixing pipe; 14, second mixing pipe; 2, dosing pipe; 3, control assembly; 31, ball; 311, communication groove; 32, control member; 4, auxiliary assembly; 41, intercepting box; 411, extrusion part; 42, baffle; 421, sliding sleeve; 5, vertical part; 51, communication part; 6, filter plate; 7, elastic assembly; 71, clamping block; 711, guide inclined surface; 72, elastic member; 8, clamping groove; 9, sealing ring; 91, circular arc surface. DETAILED DESCRIPTION

[0040] The embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiments described below by way of example with reference to the accompanying drawings are illustrative and are intended to explain the present application, and are not to be understood as limiting the present application.

[0041] As Figures 1 to 9 shown, the inhibitor online premixing device for stable urea production of the present application comprises a pipe 1 and a dosing pipe 2 installed on the pipe 1, the dosing pipe 2 communicates with the pipe 1, urea solution flows in the pipe 1, and is premixed with urea solution by adding into the pipe 1 through the dosing pipe 2, and then the premixed solution is discharged into a stirring tank (not shown in the figure) for secondary mixing.

[0042] Referring to Figure 1 , Figure 2 , the pipe 1 comprises a feed pipe 11, a discharge pipe 12, a first mixing pipe 13 and a second mixing pipe 14, the feed pipe 11 and the discharge pipe 12 are arranged in the same direction, i.e. the center lines of the feed pipe 11 and the discharge pipe 12 are located on the same straight line, the feed pipe 11 and the discharge pipe 12 are arranged at intervals, the first mixing pipe 13 and the second mixing pipe 14 are located between the feed pipe 11 and the discharge pipe 12, and the two ends of the first mixing pipe 13 and the second mixing pipe 14 respectively communicate with the feed pipe 11 and the discharge pipe 12. The dosing pipe 2 is arranged on the feed pipe 11, and the discharge pipe 12 communicates with the stirring tank.

[0043] Referring to Figure 2 , Figure 3 , Figure 4 , the control assembly 3 and the auxiliary assembly 4 are arranged on the pipe 1, and cooperate to premix the solution. The control assembly 3 is arranged on the feed pipe 11 and located at the communication position of the feed pipe 11, the first mixing pipe 13 and the second mixing pipe 14, and is used to control the communication of the feed pipe 11 with the first mixing pipe 13 or the second mixing pipe 14. The auxiliary assembly 4 is arranged between the feed pipe 11, the first mixing pipe 13 and the second mixing pipe 14, and is used to eliminate the agglomerated materials contained in the solution.

[0044] Referring to Figure 2 ,Figure 4 The auxiliary assembly 4 comprises an intercepting box 41, a baffle 42, the intercepting box 41 is located at one end of the discharge pipe 12 close to the feeding pipe 11, and the discharge pipe 12 is in communication with the inside of the intercepting box 41, the intercepting box 41 is located between the first mixing pipe 13 and the second mixing pipe 14, the first mixing pipe 13 and the second mixing pipe 14 are located on the two sides of the intercepting box 41 respectively, and the first mixing pipe 13 and the second mixing pipe 14 are in communication with the intercepting box 41, that is, the first mixing pipe 13 and the second mixing pipe 14 are in communication with the discharge pipe 12 through the intercepting box 41. The baffle 42 is arranged in the intercepting box 41, and the baffle 42 is arranged vertically to the end surface of the discharge pipe 12, the baffle 42 is arranged slidingly in the intercepting box 41, and the sliding direction of the baffle 42 is perpendicular to the center line of the discharge pipe 12, that is, the baffle 42 slides between the first mixing pipe 13 and the second mixing pipe 14.

[0045] When the pre-mixing is performed, the control assembly 3 controls the feeding pipe 11 to be in communication with the first mixing pipe 13 or controls the feeding pipe 11 to be in communication with the second mixing pipe 14, when the scraper is close to the first mixing pipe 13, the control assembly 3 controls the feeding pipe 11 to be in communication with the first mixing pipe 13, the solution enters the first mixing pipe 13 and flows to contact the baffle 42, and the baffle 42 is pushed to move, so that the baffle 42 moves close to the second mixing pipe 14, and then the solution is discharged through the discharge pipe 12. When the solution contacts the baffle 42, the baffle 42 is impacted to form a water hammer effect, and the agglomerated materials contained in the solution are broken, and the mixing effect of the solution is improved. When the baffle 42 moves to the second mixing pipe 14, the control assembly 3 controls the feeding pipe 11 to be in communication with the second mixing pipe 14, the solution enters the second mixing pipe 14 and flows to contact the baffle 42, and the baffle 42 is driven to move in the opposite direction, and the water hammer effect is also formed, and the agglomerated materials are broken again. The control assembly 3 controls the solution to enter the first mixing pipe 13 and the second mixing pipe 14 alternately, so that the baffle 42 reciprocates between the first mixing pipe 13 and the second mixing pipe 14, and the water hammer effect is formed when the solution contacts the baffle 42, so as to eliminate the agglomerated materials.

[0046] Referring to Figure 2 The first mixing pipe 13 and the second mixing pipe 14 are the same in structure, and the first mixing pipe 13 and the second mixing pipe 14 both comprise a vertical portion 5, and the first mixing pipe 13 and the second mixing pipe 14 are in communication with the intercepting box 41 through the vertical portion 5. The center line of the vertical portion 5 is perpendicular to the baffle 42, that is, the center line of the vertical portion 5 is the same as the sliding direction of the baffle 42. When the solution enters the intercepting box 41 through the first mixing pipe 13 or the second mixing pipe 14, the solution flows vertically to the baffle 42, so as to improve the water hammer effect after the solution collides with the baffle 42, and improve the breaking effect on the agglomerated materials.

[0047] Referring to Figure 2 , Figure 4 ,Figure 5 A filter plate 6 is arranged in the intercepting box 41, located at the connection between the intercepting box 41 and the discharge pipe 12, and the solution will pass through the intercepting box 41 and the filter plate 6 in sequence and enter the discharge pipe 12. The baffle plate 42 is arranged on the side of the filter plate 6 away from the discharge pipe 12, the side surface of the baffle plate 42 is in sliding abutment with the filter plate 6, and the baffle plate 42 is perpendicular to the filter plate 6. When the solution passes through the filter plate 6, the residual agglomerated material in the solution is filtered by the filter plate 6, so that the agglomerated material is intercepted in the intercepting box 41, and the agglomerated material is assisted to be crushed when the solution contacts the baffle plate 42 to form a water hammer effect. At the same time, the baffle plate 42 reciprocates, and the material attached to the filter plate 6 is scraped off when the baffle plate 42 moves, so as to ensure the filtering effect of the filter plate 6.

[0048] Referring to Figure 4 , Figure 8 An extrusion part 411 is arranged in the intercepting box 41, the extrusion part 411 is part of the inner wall of the intercepting box 41, and the extrusion part 411 is located on both sides of the filter plate 6, that is, two extrusion parts 411 are arranged on both sides of the filter plate 6, the baffle plate 42 is located between the two extrusion parts 411 and is arranged in sliding mode between the two extrusion parts 411.

[0049] When the baffle plate 42 reciprocates, the agglomerated material on the filter screen is scraped off, and the scraped material is driven to be close to the extrusion part 411. When the baffle plate 42 moves close to the extrusion part 411, the distance between the baffle plate 42 and the extrusion part 411 gradually decreases, and the extrusion part 411 extrudes the agglomerated material to crush the scraped material, improve the mixing effect of the material and the solution, and further improve the premixing effect of the solution. After the baffle plate 42 moves to abut against the extrusion part 411, the control assembly 3 adjusts the flow path of the solution in the first mixing pipe 13 and the second mixing pipe 14, drives the baffle plate 42 to rotate in the opposite direction, and then drives the baffle plate 42 to cooperate with the other extrusion part 411 to extrude the residual agglomerated material again, and the crushed material is mixed with the solution by the water hammer effect formed when the solution contacts the baffle plate 42.

[0050] Referring to Figure 8 , the baffle plate 42 is in sliding abutment with the inner wall of the intercepting box 41, so that the baffle plate 42 can cover the intercepting box 41 when moving, and the extrusion part 411 is parallel to the baffle plate 42, so that the baffle plate 42 can fully extrude the material between the baffle plate 42 and the extrusion part 411 when moving to the extrusion part 411, thereby improving the crushing effect of the material.

[0051] Referring to Figure 6 , Figure 7The elastic assembly 7 is arranged on the baffle 42, and the elastic assembly 7 comprises a clamping block 71 and an elastic piece 72. The clamping block 71 is in sliding fit with the baffle 42, and a sliding sleeve 421 is arranged on the side of the baffle 42. The clamping block 71 is in sliding fit on the baffle 42 through the sliding sleeve 421. The clamping block 71 slides towards or away from the baffle 42. The elastic piece 72 is arranged as a spring, and the elastic piece 72 is arranged between the clamping block 71 and the baffle 42 and connected with the clamping block 71 and the baffle 42 respectively. The elastic piece 72 is used to drive the clamping block 71 to slide away from the baffle 42. A plurality of clamping grooves 8 are arranged on the intercepting box 41 and arranged along the sliding direction of the baffle 42. The clamping block 71 is driven by the elastic piece 72 to be close to the clamping grooves 8 and buckled with the clamping grooves 8. The clamping block 71 is provided with a guide inclined surface 711 on both sides. The shape of the clamping groove 8 is matched with the guide inclined surface 711 of the clamping block 71. When the clamping block 71 is buckled with the clamping groove 8, the guide inclined surface 711 is matched with the clamping groove 8.

[0052] Due to the cooperation of the guide inclined surface 711 and the inner wall of the clamping groove 8, when the baffle 42 moves, different positions on the guide inclined surface 711 cooperate with the clamping groove 8, and the clamping block 71 is driven to move close to the baffle 42, and the elastic piece 72 is compressed. Until the clamping block 71 is separated from the clamping groove 8, with the movement of the baffle 42, when the clamping block 71 moves to another clamping groove 8, the clamping block 71 is buckled with the corresponding clamping groove 8 again by the elastic piece 72. The above-mentioned action is repeated, and the baffle 42 moves through the plurality of clamping grooves 8 in turn. The clamping block 71 and the clamping groove 8 are arranged to increase the resistance when the baffle 42 moves, slow down the moving speed of the baffle 42 when the solution abuts against the baffle 42, and increase the water hammer effect.

[0053] Referring to Figure 6 , the elastic assembly 7 and the clamping groove 8 are provided with two groups. The two groups of elastic assemblies 7 correspond to the opposite two sides of the baffle 42 respectively, and the clamping grooves 8 are correspondingly arranged on the opposite two side walls in the intercepting box 41. Through the cooperation of the two groups of elastic assemblies 7 and the clamping grooves 8, the resistance when the baffle 42 moves is increased, so that the baffle 42 is uniformly stressed when moving, and the stability when the baffle 42 moves is improved.

[0054] Referring to Figure 2 , Figure 3 , Figure 9The control assembly 3 comprises a ball 31 and a control member 32. The ball 31 is rotationally arranged between the feeding pipe 11, the first mixing pipe 13 and the second mixing pipe 14. The rotation axis of the ball 31 is perpendicular to the plane in which the feeding pipe 11, the first mixing pipe 13 and the second mixing pipe 14 are located. A communication groove 311 is formed through the ball 31. In the embodiment, the end of the first mixing pipe 13 and the second mixing pipe 14 close to the feeding pipe 11 is a communication part 51. The communication parts 51 of the first mixing pipe 13 and the second mixing pipe 14 are located on the same straight line. The centers of the two communication parts 51 and the ball 31 are located on the same straight line. The feeding pipe 11 is perpendicular to the communication part 51. The opening angle of the two ends of the communication groove 311 is 90 degrees. The control member 32 is arranged outside the feeding pipe 11. The control member 32 is a motor. The output end of the control member 32 is located on the same straight line as the rotation axis of the ball 31. The control member 32 is used to drive the ball 31 to rotate.

[0055] The ball 31 is driven to rotate by the control member 32. After each rotation, one end of the communication groove 311 is in communication with the feeding pipe 11. When the other end of the communication groove 311 corresponds to the first mixing pipe 13, the feeding pipe 11 is in communication with the first mixing pipe 13 through the communication groove 311. The solution enters the first mixing pipe 13 through the feeding pipe 11, and then enters the discharge pipe 12 through the first mixing pipe 13. When the other end of the communication groove 311 corresponds to the second mixing pipe 14, the feeding pipe 11 is in communication with the second mixing pipe 14 through the communication groove 311. The solution enters the second mixing pipe 14 through the feeding pipe 11, and then enters the discharge pipe 12 through the second mixing pipe 14. The flow path of the solution is controlled.

[0056] Referring to Figure 3 , Figure 9 The sealing rings 9 are arranged on the first mixing pipe 13 and the second mixing pipe 14, and close to the feeding pipe 11. The ball 31 is arranged between the two sealing rings 9. The arc surfaces 91 are formed on the side of the sealing rings 9 close to the ball 31. The sealing rings 9 abut the side surface of the ball 31 through the arc surfaces 91. The contact area between the sealing rings 9 and the ball 31 is increased, and the sealing performance of the cooperation between the sealing rings 9 and the ball 31 is improved.

[0057] In order to facilitate the adjustment of the moving direction of the baffle 42 after the baffle 42 is moved to the designated position. An inductor is arranged in the intercepting box 41, which is arranged on the extrusion part 411 for detecting the pressure received by the extrusion part 411, and is arranged as a pressure sensor capable of converting the detected pressure value into an electrical signal output. The pressure sensor can adopt various types such as resistance type, capacitance type, piezoresistive type or piezoelectric type. A controller is arranged on the feed pipe 11, and the signal output end of the inductor is electrically connected with the signal receiving end of the controller, and the control end of the controller is electrically connected with the control member 32. When the baffle 42 is close to the extrusion part 411 and extrudes the agglomerated material, the pressure received by the extrusion part 411 increases, and at the same time the inductor detects the pressure received by the extrusion part 411. After the inductor detects that the pressure received by the extrusion part 411 reaches a designated value, a signal is sent to the controller, and after the controller receives the signal, the controller subsequently controls the start of the control member 32 to drive the ball 31 to rotate, adjusts the flow path of the solution, and drives the baffle 42 to move in the opposite direction.

[0058] In addition, the specified pressure threshold of the controller should be designed to be adjustable, and during the mixing of the solution, the appropriate pressure threshold can be preset through the man-machine interface or other input methods to realize more flexible control. In order to more comprehensively reflect the extrusion situation, the inductors can be arranged at multiple positions of the extrusion part 411, and the multi-point signals are collected to the controller for average processing, so as to avoid misjudgment caused by local uneven stress. The control member 32 can select different types of drivers according to actual needs, such as servo motors, stepping motors, etc.

[0059] The implementation principle of the present application is that: the urea solution flows from the feed pipe 11, and the inhibitor is added through the dosing pipe 2, and is preliminarily mixed in the pipeline 1. At the same time, the control member 32 drives the ball 31 to rotate to adjust the position of the communication groove 311, and controls the solution to selectively flow into the first mixing pipe 13 or the second mixing pipe 14. When the solution flows into the first mixing pipe 13, it will hit the baffle 42 in the intercepting box 41, and the baffle 42 slides to the other side under the push of the solution. In the sliding process, the impact of the solution and the baffle 42 will produce a water hammer effect to break up the agglomerated material in the solution. By alternately controlling the flow direction of the solution to the first mixing pipe 13 and the second mixing pipe 14 through the control assembly 3, the baffle 42 reciprocates in the intercepting box 41, and the repeated water hammer effect enhances the breaking effect of the agglomerated material.

[0060] In addition, the reciprocating movement of the baffle 42 will scrape off the agglomerated material that may be attached to the filter plate 6. During the sliding process, the baffle 42 will drive the scraped agglomerated material to the extrusion part 411 in the intercepting box 41. When the baffle 42 approaches the extrusion part 411, the distance between the baffle 42 and the extrusion part 411 is reduced, which will extrude and further crush the agglomerated material. The inductor on the extrusion part 411 will monitor the pressure of the extrusion part 411 in real time. When the pressure reaches a predetermined specified value, the inductor will send a signal to the controller. After the controller receives the signal, the controller will control the starting control 32 to rotate the ball 31, so as to change the flow path of the solution among the feed pipe 11, the first mixing pipe 13 and the second mixing pipe 14. The change of the path will change the direction of the force acting on the baffle 42, so as to drive the baffle 42 to move in the opposite direction, continue to execute the water hammer effect and the extrusion crushing process, and form a closed loop automatic adjustment. After the material is treated by the water hammer effect and the extrusion in the intercepting box 41, the material is filtered again by the filter plate 6 in the intercepting box 41, and the residual agglomerated material is intercepted. Finally, the pre-mixed solution is discharged and sent to the stirring tank for more sufficient secondary mixing.

[0061] Although the embodiments of the present application have been shown and described above, it should be understood by those skilled in the art that the above embodiments are exemplary and cannot be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A kind of inhibitor on-line premixing device for stability urea production, including pipeline and dosing pipe on pipeline, it is characterized in that, The pipeline is provided with a control assembly and an auxiliary assembly. The pipeline comprises: a feeding pipe and a discharging pipe, and a first mixing pipe and a second mixing pipe located between the feeding pipe and the discharging pipe and respectively communicating with the two pipes. The control assembly is arranged on the feeding pipe to control the communication of the feeding pipe with the first mixing pipe or the second mixing pipe. The auxiliary assembly comprises: an intercepting box and a baffle. The intercepting box is located between the discharging pipe, the first mixing pipe and the second mixing pipe and communicates with the three pipes. The baffle is perpendicular to the end face of the discharging pipe and is arranged to slide between the first mixing pipe and the second mixing pipe. The control assembly controls the solution to flow alternately into the first mixing pipe and the second mixing pipe, so that the solution pushes the baffle to move reciprocally in the intercepting box and then enters the discharging pipe, and at the same time, the solution impacts the baffle to form a water hammer effect to break up the agglomerated materials contained in the solution. A filter plate is arranged at the connection between the intercepting box and the discharging pipe, and the side surface of the baffle is arranged to slide against the filter plate to scrape off the agglomerated materials attached to the filter plate when the baffle moves. An extrusion part is arranged in the intercepting box and located on both sides of the filter plate. The baffle moves to abut against the extrusion part to extrude and break the agglomerated materials scraped off from the filter plate. An elastic assembly is arranged on the baffle, and a plurality of clamping grooves are arranged on the inner wall of the intercepting box along the sliding direction of the baffle. The elastic assembly comprises: a clamping block slidingly arranged on the baffle, and an elastic member connecting the clamping block and the baffle. The elastic member is used to drive the clamping block to move and be buckled with the clamping groove. The two sides of the clamping block are provided with guide inclined surfaces which abut against the inner wall of the clamping groove. When the baffle moves, the clamping block moves to be buckled with different clamping grooves through the guide inclined surfaces. When the clamping block is separated from the clamping groove, the elastic member is compressed.

2. The on-line premixing device for inhibitors for stable urea production according to claim 1, characterized in that, The control assembly comprises: a ball and a control member arranged on the feeding pipe. The ball is arranged to rotate between the feeding pipe, the first mixing pipe and the second mixing pipe. The output end of the control member is connected with the ball to drive the ball to rotate. A communication groove is arranged to pass through the ball. When the two ends of the communication groove correspond to the feeding pipe and the first mixing pipe respectively, the solution enters the first mixing pipe. When the two ends of the communication groove correspond to the feeding pipe and the second mixing pipe respectively, the solution enters the second mixing pipe.

3. The on-line inhibitor premixing device for stable urea production according to claim 1, characterized in that, The elastic assembly and the clamping groove are both provided with two groups. The two groups of elastic assemblies are arranged on the opposite two side edges of the baffle.

4. The on-line inhibitor premixing device for stable urea production according to claim 2, characterized in that, An induction member is arranged in the intercepting box to detect whether the baffle abuts against the extrusion part. A controller is arranged on the feeding pipe. The control end of the controller is connected with the control member to control the rotating direction of the ball. The signal output end of the induction member is electrically connected with the signal receiving end of the controller. When the induction member detects that the baffle moves to abut against the extrusion part, the induction member sends a signal to the controller. The controller controls the ball to rotate through the control member.

5. The on-line premixing device for inhibitors for stable urea production according to claim 2, characterized in that, The first mixing pipe and the second mixing pipe are both provided with a sealing ring at the end close to the feeding pipe. The inner side of the sealing ring is provided with a circular arc surface which abuts against the side surface of the ball.

6. The on-line inhibitor premixing device for stable urea production according to claim 1, characterized in that, The first mixing pipe and the second mixing pipe both comprise a vertical part which communicates with the intercepting box. The center line of the vertical part is the same as the sliding direction of the baffle.

7. The on-line premixing device for inhibitors for stable urea production according to claim 1, characterized in that, The baffle abuts against the inner wall of the intercepting box, and the extrusion part is parallel to the baffle.

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