Evaporator for urea production

Abstract

The utility model provides an evaporator for urea production, which comprises a driving shaft arranged along the axial direction of a tank body, a scraper which is fixedly connected to the driving shaft and abuts against the inner wall of the tank body, a sleeve which is coaxially arranged with the driving shaft is fixedly connected to the interior of the tank body, a sliding sleeve is sleeved outside the sleeve, and a movable plate is fixedly connected to the sliding sleeve. The outer end of the movable plate is slidably clamped to the scraper, a sliding groove is formed in the outer wall of the sleeve, a positioning rod with the inner end clamped to the sliding groove is fixedly connected to the sliding sleeve, and the movable plate can slide back and forth in the lengthwise direction of the scraper when rotating along with the scraper. The scraper is driven by the driving shaft to rotate, dirt adhering to the inner wall of the tank body can be scraped away, the movable plate designed in a matched mode can slide in a reciprocating mode in the lengthwise direction of the scraper when rotating along with the scraper, the scraper can be cleaned, and the removed dirt is prevented from adhering to the scraper.

Description

Technical Field

[0001] The present application relates to the technical field of chemical equipment, and in particular to an evaporator for urea production. Background Art

[0002] The evaporator is an important equipment in the urea production process, which can remove the water in the urea aqueous solution by evaporation. After running for a period of time, the scale adhered to the inner wall of the evaporator will affect the internal environment. If it is not removed in time, it will affect the normal use of the evaporator. For this reason, the inventor proposes an evaporator for urea production. Utility Model Content

[0003] The object of the present application is to provide an evaporator for urea production, which can facilitate the removal of scale.

[0004] The embodiment of the present application is implemented as follows:

[0005] The present application provides an evaporator for urea production, comprising a driving shaft arranged along the axial direction of a tank body, a scraper abutting against the inner wall of the tank body being fixedly connected to the driving shaft, a sleeve coaxially arranged with the driving shaft being fixedly connected to the interior of the tank body, a sliding sleeve being sleeved on the outside of the sleeve, a movable plate being fixedly connected to the sliding sleeve, an outer end of the movable plate being slidably engaged with the scraper, a sliding groove being provided on the outer wall of the sleeve, a positioning rod having an inner end engaged with the sliding groove being fixedly connected to the sliding sleeve, and the movable plate being able to slide back and forth along the longitudinal direction of the scraper when rotating with the scraper.

[0006] The present application drives the scraper to rotate by a driving shaft, so as to scrape off the dirt adhered to the inner wall of the tank body. The movable plate designed in conjunction with the scraper can slide back and forth along the longitudinal direction of the scraper as it rotates, so as to clean the scraper and prevent the removed dirt from adhering to the scraper.

[0007] In an optional embodiment, the drive shaft is coaxially arranged with the tank body.

[0008] In an optional embodiment, a connecting plate is fixedly connected between the driving shaft and the scraper.

[0009] In an optional embodiment, the scrapers are evenly distributed along the circumference of the drive shaft.

[0010] In an optional embodiment, the scraper is arranged in parallel with the driving shaft as a whole.

[0011] In an optional embodiment, a crossbeam for accommodating the sleeve is fixed inside the tank body.

[0012] In an optional embodiment, the cross beam is arranged along the diameter direction of the tank body.

[0013] In an optional embodiment, the lower end of the drive shaft is rotatably inserted into the sleeve.

[0014] In an optional embodiment, the movable plate is entirely arranged along the radial direction of the tank body.

[0015] In an optional embodiment, a slot for clamping a scraper is formed at the outer end of the movable plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the embodiments described below are only used to explain the present application, rather than to limit the scope of the present application. In the accompanying drawings:

[0017] Figure 1 is a schematic diagram of an evaporator for urea production according to an embodiment of the present application;

[0018] Figure 2 is a schematic diagram of a movable plate according to an embodiment of the present application;

[0019] Reference numerals:

[0020] 10. Tank body;

[0021] 20. Drive shaft;

[0022] 30. Sleeve;

[0023] 11. Feed pipe;

[0024] 12. Discharge pipe;

[0025] 13. Heater;

[0026] 21. Motor;

[0027] 22. Connecting plate;

[0028] 23. Scraper;

[0029] 31. Beam;

[0030] 32. Chute;

[0031] 33. Sliding sleeve;

[0032] 34. Positioning rod;

[0033] 35. Movable board;

[0034] 36. Card slot. DETAILED DESCRIPTION

[0035] Example 1

[0036] See also Figure 1-Figure 2 This embodiment provides an evaporator for urea production to solve the problem that the normal use of the existing evaporator is affected by scale adhering to the inner wall.

[0037] In this embodiment, the evaporator for urea production includes a drive shaft 20 arranged along the axial direction of the tank body 10, a scraper 23 abutting the inner wall of the tank body 10 is fixedly connected to the drive shaft 20, a sleeve 30 coaxially arranged with the drive shaft 20 is fixedly connected inside the tank body 10, a sliding sleeve 33 is slidably mounted on the outside of the sleeve 30, a movable plate 35 is fixedly connected to the sliding sleeve 33, and the outer end of the movable plate 35 is slidably engaged with the scraper 23, a sliding groove 32 is provided on the outer wall of the sleeve 30, a positioning rod 34 whose inner end is engaged with the sliding groove 32 is fixedly connected to the sliding sleeve 33, and the movable plate 35 can slide back and forth along the longitudinal direction of the scraper 23 when following the rotation of the scraper 23.

[0038] In this embodiment, the scraper 23 is driven to rotate by the driving shaft 20, so as to scrape off the dirt adhered to the inner wall of the tank body 10. The movable plate 35 designed in conjunction with the scraper 23 can slide back and forth along the longitudinal direction of the scraper 23 when rotating, thereby cleaning the scraper 23 and preventing the removed dirt from adhering to the scraper 23.

[0039] It should be noted that the tank body 10 is cylindrical as a whole, and a feed pipe 11 is provided at the lower part of the tank body 10, and a discharge pipe 12 is provided at the upper part of the tank body 10. At the same time, a heater 13 is provided at the bottom of the tank body 10. Through the heating effect of the heater 13, the urea aqueous solution at the bottom of the tank body 10 can be boiled, and the steam generated by the evaporation of the urea aqueous solution flows upward inside the tank body 10 and is discharged from the discharge pipe 12.

[0040] It should also be noted that a motor 21 is fixedly connected to the top of the tank body 10, and the motor 21 is transmission-connected to the drive shaft 20 for driving the drive shaft 20 to rotate. The drive shaft 20 as a whole is coaxially arranged with the tank body 10, and a connecting plate 22 is fixedly connected to the drive shaft 20, and the connecting plate 22 as a whole is vertically arranged with the drive shaft 20. A scraper 23 is fixedly connected to the outer end of the connecting plate 22 and abuts against the inner wall of the tank body 10. The scraper 23 is evenly arranged along the circumference of the drive shaft 20, and the scraper 23 as a whole is parallel to the drive shaft. When the drive shaft 20 rotates under the drive of the motor 21, the scraper 23 will rotate synchronously with the drive shaft 20, and the scraper 23 is rotated around the circumference of the tank body 10 to scrape off the scale adhered to the inner wall of the tank body 10.

[0041] In addition, a cross beam 31 is fixedly connected inside the tank body 10, and the cross beam 31 is arranged as a whole along the diameter direction of the tank body 10. The cross beam 31 is arranged as a whole below the scraper 23. The sleeve 30 is fixedly connected to the cross beam 31, and the sleeve 30 and the drive shaft 20 are arranged coaxially. The lower end of the drive shaft 20 can be rotatably inserted into the sleeve 30, and the drive shaft 20 rotates inside the sleeve 30. The sleeve 30 can support the drive shaft 20, thereby ensuring the axial alignment of the drive shaft 20.

[0042] In addition, a slide groove 32 is formed on the outer wall of the sleeve 30. The slide groove 32 extends along the circumference of the sleeve 30 and is a closed-loop structure. The slide groove 32 is constructed as an ellipse whose axis is inclined with the sleeve 30. The sleeve 33 can be slidably mounted on the outside of the sleeve 30. A positioning rod 34 is screwed on the sleeve 33, and the positioning rod 34 is arranged along the radial direction of the sleeve 30 as a whole. The inner end of the positioning rod 34 can be slidably engaged with the inside of the slide groove 32. The movable plate 35 is fixed to the outer wall of the sleeve 33, and the movable plate 35 is arranged along the radial direction of the tank body 10 as a whole. A slot 36 for engaging the scraper 23 is provided at the outer end of the movable plate 35.

[0043] It should be understood that, by utilizing the sliding engagement between the movable plate 35 and the scraper 23, when the scraper 23 rotates following the drive shaft 20, the movable plate 35 will rotate synchronously with the scraper 23. At this time, by utilizing the sliding engagement between the positioning rod 34 and the slide groove 32, the sliding sleeve 33 can move back and forth along the axial direction of the sleeve 30, that is, the movable plate 35 can slide back and forth along the longitudinal direction of the scraper 23 while rotating synchronously with the scraper 23.

[0044] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An evaporator for urea production, characterized in that: It includes a driving shaft arranged along the axial direction of the tank body, a scraper abutting the inner wall of the tank body is fixedly connected to the driving shaft, a sleeve coaxially arranged with the driving shaft is fixedly connected to the inside of the tank body, a sliding sleeve is provided on the outside of the sleeve, a movable plate is fixedly connected to the sliding sleeve, the outer end of the movable plate is slidably engaged with the scraper, a sliding groove is provided on the outer wall of the sleeve, a positioning rod with an inner end engaged with the sliding groove is fixedly connected to the sliding sleeve, and the movable plate can slide back and forth along the longitudinal direction of the scraper when following the rotation of the scraper.

2. The evaporator for urea production according to claim 1, characterized in that: The driving shaft and the tank body are coaxially arranged.

3. The evaporator for urea production according to claim 1, characterized in that: A connecting plate is fixedly connected between the driving shaft and the scraper.

4. The evaporator for urea production according to claim 1, characterized in that: The scrapers are evenly distributed along the circumference of the driving shaft.

5. The evaporator for urea production according to claim 1, characterized in that: The scraper is arranged in parallel with the driving shaft as a whole.

6. The evaporator for urea production according to claim 1, characterized in that: A crossbeam for accommodating the sleeve is fixedly connected inside the tank body.

7. The evaporator for urea production according to claim 6, characterized in that The cross beam is arranged along the diameter direction of the tank body.

8. The evaporator for urea production according to claim 7, characterized in that: The lower end of the driving shaft is rotatably inserted into the sleeve.

9. The evaporator for urea production according to claim 1, characterized in that: The movable plate is arranged as a whole along the radial direction of the tank body.

10. The evaporator for urea production according to claim 1, characterized in that: The outer end of the movable plate is provided with a clamping groove for clamping the scraper.

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