Anti-precipitation device for urea production

Abstract

The utility model provides a urea production anti-precipitation device which comprises a reaction barrel, a rotating column is rotationally arranged in the reaction barrel, a sliding barrel is arranged on the outer arc surface of the rotating column in a sliding mode, and a plurality of evenly-distributed lifting stirring blades are arranged on the outer arc surface of the sliding barrel. And a lifting driving mechanism for driving the lifting stirring blades to lift up and down is arranged on the outer arc surface of the rotating column. According to the anti-precipitation device for urea production disclosed by the utility model, urea solution which is easy to precipitate can be lifted to the upper end to participate in stirring reaction through the lifting disc which moves up and down, so that the solution in the whole reaction kettle is ensured to be fully mixed, the mixing uniformity and consistency are obviously improved, the reaction time and the energy consumption are also reduced, and the production cost is reduced. The overall reaction efficiency is improved, and the cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of urea technology, and specifically relates to a device for preventing sedimentation in urea production. Background Technology

[0002] A urea production anti-precipitation device is a specialized piece of equipment or system designed to prevent urea solution from settling during storage. It uses physical methods (such as stirring) to ensure that solid particles or high-concentration areas in the urea solution do not settle to the bottom, thus maintaining the homogeneity of the solution. This is crucial for maintaining reaction efficiency and product quality.

[0003] Existing urea production anti-precipitation devices use a drive mechanism to rotate the stirring blades on a rotating column, generating eddies in the urea solution to prevent precipitation. However, these eddies can only lift the urea raw material that has settled at the bottom of the reactor to the lower half, and cannot lift the settled urea solution raw material to the upper part of the reactor to participate in the mixing reaction. The high-concentration urea solution at the bottom is not fully mixed with the low-concentration solution at the top, resulting in uneven concentration distribution of the solution in the entire reactor. In order for the urea solution settled at the bottom to fully participate in the reaction, the stirring reaction time needs to be extended, which reduces the overall reaction efficiency and increases costs. Summary of the Invention

[0004] In view of this, this utility model addresses the shortcomings of the prior art by providing a urea production anti-precipitation device. It can lift the easily precipitated urea solution to the upper part to participate in the stirring reaction by using an up-and-down moving lifting plate, ensuring that the solution in the entire reaction vessel is fully mixed, significantly improving the uniformity and consistency of mixing, while also reducing reaction time and energy consumption, improving overall reaction efficiency and reducing costs.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a urea production anti-sedimentation device, including a reaction tank, a rotating column rotatably arranged inside the reaction tank, a slide cylinder slidably arranged on the outer arc surface of the rotating column, a plurality of evenly distributed lifting and stirring blades arranged on the outer arc surface of the slide cylinder, a lifting drive mechanism for driving the lifting and stirring blades up and down arranged on the outer arc surface of the rotating column, the lifting drive mechanism including a rotating frame arranged on the outer arc surface of the rotating column, two rotating seats slidably arranged inside the rotating frame, and a connecting frame rotatably arranged inside each of the two rotating seats, the outer arc surface of the slide cylinder... Rotating frames are provided on the left and right sides of the reaction vessel. The lower ends of multiple connecting frames are rotatably connected to the interior of adjacent rotating frames. Two reciprocating screws are rotatably provided on the upper end of the rotating frames. Two rotating seats are threadedly connected to adjacent reciprocating screws. Helical gear 1 is provided on the inner end of each of the two reciprocating screws. Helical gear 2 is provided on the top wall of the reaction vessel. The two helical gears 1 and one helical gear 2 are meshed together. A drive unit for driving the rotating column is provided at the upper end of the reaction vessel. The drive unit includes a motor located at the upper end of the reaction vessel. The output shaft of the motor is connected to the upper end of the rotating column through a coupling.

[0006] As a further improvement of this utility model, a feed inlet is provided at the upper end of the reaction tank, a feed pipe is provided in the feed inlet on the right side of the reaction tank, and a discharge pipe is provided in the discharge outlet at the lower end of the reaction tank. A solenoid valve is connected in series in the middle of the discharge pipe.

[0007] As a further improvement of this utility model, a control panel is provided on the front side of the outer arc face of the reaction vessel, and the motor and solenoid valve are electrically connected to the control panel.

[0008] As a further improvement of this utility model, a scraper frame is provided at the lower end of the rotating column to cooperate with the inner arc wall of the reaction tank, and the rotating column and the scraper frame are fixed by welding.

[0009] As a further improvement of this utility model, multiple support frames are provided on the outer arc surface of the reaction tank, and the reaction tank and the support frames are fixed together by welding.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] Firstly, the motor is started via the control panel, and the output shaft drives the rotating column to rotate, which in turn drives the lifting agitator on the outer arc surface of the slide to rotate, thus agitating the urea raw material. At the same time, the bevel gears on both sides of the rotating frame are affected by the meshing relationship of the bevel gear ring, causing the reciprocating screws on both sides to rotate. This causes the rotating seats on both sides to move closer and further apart, causing the internal connecting frame to rotate and converge or expand. This also causes the lifting agitator on the sleeve of the rotating frame to move up and down, lifting the urea raw material that has settled at the bottom of the tank to the top to fully mix with the remaining urea raw material. The lifting plate that moves up and down can also lift the easily settled urea solution to the top to participate in the stirring reaction, ensuring that the solution in the entire reactor is fully mixed. This significantly improves the uniformity and consistency of the mixing, while also reducing reaction time and energy consumption, improving the overall reaction efficiency, and reducing costs.

[0012] Secondly, the rotation of the rotating column can drive the scraper to rotate, which can scrape off the urea raw material that has precipitated and adhered to the inner wall of the reaction tank, so that it can continue to participate in the stirring and mixing reaction, thus avoiding the phenomenon of urea raw material precipitating and adhering to the inner wall of the reaction tank. Attached Figure Description

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0016] Figure 3 This is an enlarged structural diagram of point A in this utility model;

[0017] Figure 4 This is a front sectional view of the present invention.

[0018] In the diagram: 101, reaction vessel; 102, feed pipe; 103, feed inlet; 104, solenoid valve; 105, control panel; 106, support frame; 107, discharge pipe; 201, motor; 202, rotating frame; 203, rotating seat; 204, connecting frame; 205, rotating frame; 206, slide; 207, lifting stirring blade; 208, rotating column; 209, reciprocating screw; 210, helical gear one; 211, helical gear two; 301, scraper frame. Detailed Implementation

[0019] To better understand this utility model, the following embodiments further illustrate its content, but the scope of protection of this utility model is not limited to the embodiments described below. Numerous specific details are set forth in the following description to provide a more thorough understanding of this utility model. However, it will be apparent to those skilled in the art that this utility model can be practiced without one or more of these details.

[0020] like Figure 1 , 2 As shown in Figure 4, a urea production anti-sedimentation device includes a reaction tank 101. A rotating column 208 is rotatably arranged inside the reaction tank 101. A slide cylinder 206 is slidably arranged on the outer arc surface of the rotating column 208. Multiple evenly distributed lifting and stirring blades 207 are arranged on the outer arc surface of the slide cylinder 206. A lifting drive mechanism for driving the lifting and stirring blades 207 to lift up and down is arranged on the outer arc surface of the rotating column 208. A scraper frame 301 that is installed in conjunction with the inner arc wall of the reaction tank 101 is arranged at the lower end of the rotating column 208. A feed inlet 103 is opened at the upper end of the reaction tank 101. A feed pipe 102 is arranged in the feed inlet 103 opened on the right side of the reaction tank 101. A discharge pipe 107 is arranged in the discharge outlet opened at the lower end of the reaction tank 101. A solenoid valve 104 is connected in series in the middle of the discharge pipe 107.

[0021] like Figure 2 , 3 As shown in Figure 4, the lifting drive mechanism includes a rotating frame 202 mounted on the outer arc surface of the rotating column 208. Two rotating seats 203 are slidably mounted inside the rotating frame 202, with their left and right positions corresponding. A connecting frame 204 is rotatably mounted inside each of the two rotating seats 203. Rotating frames 205 are mounted on the left and right sides of the outer arc surface of the slide cylinder 206. The lower ends of the multiple connecting frames 204 are rotatably connected to the interior of adjacent rotating frames 205. Two reciprocating lead screws 209 are rotatably mounted on the upper end of the rotating frame 202. Each rotating seat 203 is threadedly connected to an adjacent reciprocating lead screw 209. Helical gear 1 210 is provided on the inner end of each of the two reciprocating lead screws 209. Helical gear 211 is provided on the top wall of the reaction tank 101. The two helical gears 1 210 are meshed with one helical gear 211. A drive unit for driving the rotating column 208 to rotate is provided at the upper end of the reaction tank 101. The drive unit includes a motor 201 provided at the upper end of the reaction tank 101. The output shaft of the motor 201 is connected to the upper end of the rotating column 208 through a coupling.

[0022] like Figure 1 As shown, a control panel 105 is provided on the front side of the outer arc of the reaction vessel 101, and the motor 201 and the solenoid valve 104 are electrically connected to the control panel 105.

[0023] The raw materials for urea are added into the reaction tank 101 through the feed inlet 103 and the liquid inlet pipe. Then, the motor 201 is turned on by the control panel 105. The output shaft drives the rotating column 208 to rotate, which in turn drives the lifting stirring plate 207 on the outer arc surface of the slide 206 to rotate, thereby realizing the stirring of the urea raw materials.

[0024] Meanwhile, the bevel gears on both sides of the rotating frame 202 are affected by the bevel gear ring meshing relationship, causing the reciprocating screws 209 on both sides to rotate. This can drive the rotating seats 203 on both sides to move closer and further apart, causing the connecting frame 204 inside to rotate and converge or expand towards each other. This also drives the lifting stirring plate 207 on the sleeve of the rotating frame 205 to move up and down, lifting the urea raw material settled at the bottom of the barrel to the top and mixing it with the remaining urea raw material.

[0025] When the urea raw material is lifted, the rotation of the rotating column 208 can drive the scraper 301 to rotate, which can scrape off the urea raw material that has precipitated and adhered to the inner wall of the reaction tank 101, so that it can continue to participate in the stirring and mixing reaction.

[0026] After the mixing reaction is complete, personnel can open the solenoid valve 104 through the control panel 105, so that the reacted urea solution is discharged from the discharge pipe 107.

[0027] According to another embodiment of the present invention, such as Figure 1 As shown, multiple support frames 106 are provided on the outer arc surface of the reaction tank 101. The support frames 106 can provide stable support for the reaction tank 101, ensuring that the anti-sedimentation device inside the reaction tank 101 operates more stably.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A urea production anti-precipitation device, comprising a reaction tank (101), characterized in that: The reaction vessel (101) is equipped with a rotating column (208) inside. A slide cylinder (206) is slidably arranged on the outer arc surface of the rotating column (208). Multiple uniformly distributed lifting and stirring blades (207) are arranged on the outer arc surface of the slide cylinder (206). A lifting drive mechanism for driving the lifting and stirring blades (207) to lift up and down is arranged on the outer arc surface of the rotating column (208).

2. The urea production anti-precipitation device as described in claim 1, characterized in that: The lifting drive mechanism includes a rotating frame (202) mounted on the outer arc surface of the rotating column (208). Two rotating seats (203) are slidably mounted inside the rotating frame (202). A connecting frame (204) is rotatably mounted inside each of the two rotating seats (203). Rotating frames (205) are mounted on the left and right sides of the outer arc surface of the slide cylinder (206). The lower ends of the multiple connecting frames (204) are rotatably connected to the interior of adjacent rotating frames (205). The upper end of the rotating frame (202) rotates... The reactor is equipped with two reciprocating lead screws (209), and two rotating seats (203) are threadedly connected to the adjacent reciprocating lead screws (209). Helical gear 1 (210) is provided on the inner end of each of the two reciprocating lead screws (209), and helical gear 2 (211) is provided on the top wall of the reactor (101). The two helical gear 1 (210) mesh with one helical gear 2 (211). The upper end of the reactor (101) is provided with a drive unit for driving the rotating column (208) to rotate.

3. The urea production anti-precipitation device as described in claim 2, characterized in that: The drive unit includes a motor (201) mounted on the upper end of the reaction vessel (101), and the output shaft of the motor (201) is connected to the upper end of the rotating column (208) via a coupling.

4. The urea production anti-precipitation device as described in claim 1, characterized in that: The lower end of the rotating column (208) is provided with a scraper frame (301) that is installed in conjunction with the inner arc wall of the reaction vessel (101).

5. The urea production anti-precipitation device as described in claim 3, characterized in that: The reaction vessel (101) has a feed inlet (103) at the upper end, a feed pipe (102) is installed in the feed inlet (103) on the right side of the reaction vessel (101), and a discharge pipe (107) is installed in the discharge outlet at the lower end of the reaction vessel (101). A solenoid valve (104) is connected in series in the middle of the discharge pipe (107).

6. The urea production anti-precipitation device as described in claim 1, characterized in that: Multiple support frames (106) are provided on the outer arc surface of the reaction vessel (101).

7. The urea production anti-precipitation device as described in claim 5, characterized in that: A control panel (105) is provided on the front side of the outer arc of the reaction vessel (101), and the motor (201) and the solenoid valve (104) are electrically connected to the control panel (105).

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