CN216366693U

CN216366693U - Scraper evaporator for treating crystallization slurry

Info

Publication number: CN216366693U
Application number: CN202122485509.8U
Authority: CN
Inventors: 杭明
Original assignee: Myande Group Co Ltd
Current assignee: Myande Group Co Ltd
Priority date: 2021-10-15
Filing date: 2021-10-15
Publication date: 2022-04-26
Anticipated expiration: 2031-10-15

Abstract

The utility model relates to a scraper evaporator for treating crystal slurry, wherein a plurality of groups of cross supports are arranged in the inner cavity of an evaporation chamber at the middle section of a cylinder along the height direction of a main shaft, U-shaped channel steel with an outward opening is connected between the end heads of two adjacent layers of the cross supports, a wear-resistant scraper is embedded in the inner cavity of the U-shaped channel steel, scraper bolts are respectively arranged at the upper part and the lower part of each U-shaped channel steel, the middle parts of the scraper bolts respectively penetrate through a scraper waist-shaped groove, ejector pins are respectively arranged at the upper part and the lower part of the wear-resistant scraper, the head parts of the ejector pins are abutted against the inner wall of the wear-resistant scraper, and pin bodies are sequentially arranged from bottom wall holes of the U-shaped channel steel, the center holes of the threaded pipe seat and the adjusting nut penetrate out, the threaded pipe seat is welded on the U-shaped channel steel, the adjusting nut is screwed on the threaded pipe seat, the periphery of the ejector pin is sleeved with a spring, and the spring is located in the inner cavity of the threaded pipe seat and supported between the head of the ejector pin and the bottom wall of the adjusting nut. The scraper evaporator can ensure that the scraper and the cylinder wall always keep good contact, the film forming effect of the crystal slurry is good, and the evaporation efficiency is high.

Description

Scraper evaporator for treating crystallization slurry

Technical Field

The utility model relates to an evaporative crystallization device, in particular to a scraper evaporator for treating crystallization slurry, and belongs to the technical field of high-efficiency energy-saving equipment.

Background

At present, a film evaporator is generally adopted in the industry for treating the evaporation of slurry easy to crystallize or recovering a solvent, a fixed gap type scraping blade is driven by a rotating shaft under the vacuum condition to uniformly coat the material on the inner wall of a heating cylinder, and the material is forcibly scraped into a film. Steam or heat conducting oil is introduced into a jacket outside the heating cylinder to provide heat required by evaporation; evaporating low boiling point components such as water or solvent, separating from the material, and concentrating the material or recovering the solvent of the low boiling point components.

The prior scraper evaporator has the following problems in use: 1. the adhesion of the crystalline salt on the heating wall in the material evaporation process affects the heat transfer, the evaporation efficiency is low, and the crystalline salt forms scale on the inner wall of the cylinder;

2. salt corrosion of the wall of the heating cylinder caused by long-term scaling, abrasion of the end part of the scraping blade, poor coating and scraping effects on the crystal slurry and reduced evaporation efficiency;

3. production needs to be stopped regularly, and scales are cleaned;

4. the scraping blade is difficult to replace and needs to be processed again to ensure the scraping gap.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the problems in the prior art and provide a scraper evaporator for treating crystal slurry, which can ensure that a scraper always keeps good contact with a cylinder wall, the film forming effect of the crystal slurry on the inner wall of the cylinder is good, and the evaporation efficiency is high.

In order to solve the technical problems, the scraper blade evaporator for treating the crystallized slurry comprises a barrel, wherein an evaporation chamber is arranged at the middle section of the barrel, a main shaft is arranged along the axis of the barrel, a plurality of groups of cross supports are arranged in the inner cavity of the evaporation chamber along the height direction of the main shaft, U-shaped channel steel which extends along the vertical direction and is provided with an outward opening is connected between the end heads of two adjacent layers of the cross supports, a wear-resistant scraper blade is embedded in the inner cavity of the U-shaped channel steel, scraper blade bolts are respectively arranged at the upper part and the lower part of each U-shaped channel steel, the middle part of each scraper blade bolt respectively penetrates through a scraper blade waist-shaped groove of the wear-resistant scraper blade, ejector pins are respectively arranged at the upper part and the lower part of each wear-resistant scraper blade, the heads of the ejector pins respectively abut against the inner wall of the wear-resistant scraper blade, pin bodies of the ejector pins sequentially penetrate through central holes of the bottom wall holes of the U-shaped channel steel, a threaded pipe seat and an adjusting nut, one end of the threaded pipe seat facing the barrel is welded on the bottom wall of the U-shaped channel steel, the adjusting nut is screwed at the other end of the threaded pipe seat, a spring is sleeved on the periphery of the ejector pin, and the spring is located in the inner cavity of the threaded pipe seat and supported between the head of the ejector pin and the bottom wall of the adjusting nut.

As an improvement of the utility model, the end surfaces of the wear-resistant scrapers facing to the cylinder wall are uniformly provided with scraper chutes which are parallel to each other and inclined to the horizontal plane.

As a further improvement of the utility model, the wear-resistant scrapers of two adjacent layers are staggered.

As a further improvement of the utility model, a material distribution section is arranged above the evaporation chamber, feed inlets for feeding materials along the tangential direction are symmetrically arranged on the cylinder wall of the material distribution section, and material distribution helical blades are uniformly arranged in the inner cavity of the cylinder body of the material distribution section and are fixedly connected to the main shaft.

As a further improvement of the utility model, a vacuumizing port is arranged on the side wall of the top of the cylinder, a defoaming rotating plate is arranged between the vacuumizing port and the cloth section, and the defoaming rotating plate is fixed on the main shaft.

Compared with the prior art, the utility model has the following beneficial effects: the wear-resistant scraper can move radially, a certain tension is kept to be tightly attached to the cylinder wall for scraping a film, no crystal salt is attached, and scaling is avoided; the thickness of the film is thin, the spiral direction is downward, and the evaporation efficiency is high; the wear-resistant scraper can be replaced regularly, the gap precision is guaranteed, and the rotor does not need to be replaced integrally.

Drawings

The utility model will be described in further detail with reference to the following drawings and detailed description, which are provided for reference and illustration purposes only and are not intended to limit the utility model.

FIG. 1 is a front view of a scraper evaporator for treating a crystallization slurry according to the present invention;

FIG. 2 is a perspective view of a rotor according to the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 1;

FIG. 4 is an enlarged view of the wear blade portion of FIG. 3;

FIG. 5 is a front view of the wear scraper of the present invention;

FIG. 6 is a left side view of FIG. 5;

FIG. 7 is a cross-sectional view taken along line B-B of FIG. 1;

fig. 8 is a cross-sectional view of C-C in fig. 1.

In the figure: 1. a barrel; 1a, vacuumizing port; 1b, a feed inlet; 1c, discharging hole; 2. a heating jacket; jacket inlet; 2b, jacket outlet; 3. a main shaft; 4. a cross-shaped bracket; 5, U-shaped channel steel; 6. a wear-resistant scraper; 6a, scraping a waist-shaped groove; 6b, a scraper chute; 7. a flight bolt; 8. a knock pin; 9. a threaded socket; 10. a spring; 11. adjusting the screw cap; 12. distributing helical blades; 13. a defoaming rotary plate; 14. a main motor; 15. a speed reducer; 16. a coupling; 17. the machine base supports; 18. a shaft seal device.

Detailed Description

As shown in fig. 1 to 8, the scraper evaporator for treating crystallization slurry of the present invention comprises a barrel 1, wherein an evaporation chamber is arranged at the middle section of the barrel 1, a main shaft 3 is arranged along the axis of the barrel, the upper end of the main shaft 3 penetrates out of a barrel cover, a shaft seal device 18 is arranged between the main shaft and the barrel cover, the upper end of the main shaft 3 is supported on a base support 17 and is connected with an output shaft of a speed reducer 15 through a coupling 16, and an input shaft of the speed reducer 15 is driven by a main motor 14. The lateral wall of the top of the cylinder body 1 is provided with a vacuumizing port 1a, the bottom of the cylinder body 1 is provided with a conical hopper, and the bottom of the conical hopper is provided with a discharge port 1c.

A defoaming rotary plate 13 is arranged between the vacuumizing port 1a and the cloth section, and the defoaming rotary plate 13 is fixed on the main shaft 3.

The top of evaporating chamber is equipped with the cloth section, and the symmetry is equipped with along the feed inlet 1b of tangential feeding on the section of thick bamboo wall of cloth section, and the barrel inner chamber of cloth section evenly is equipped with cloth helical blade 12, and cloth helical blade 12 fixed connection is on main shaft 3.

The outside of the barrel of the evaporation chamber is provided with a heating jacket 2, the upper part of the heating jacket 2 is provided with a jacket inlet 2a, and the bottom of the heating jacket 2 is provided with a jacket outlet 2b. Steam enters the inner cavity of the heating jacket 2 from the jacket inlet 2a, and steam condensate water is discharged from the jacket outlet 2 b; the heat conducting oil can also be used as a heat medium.

The inner chamber of evaporating chamber is equipped with multiunit cross support 4 along the direction of height of main shaft 3, is connected with between the end of adjacent two-layer cross support 4 along vertical extension and the outside U-shaped channel-section steel 5 of opening, and the inner chamber of U-shaped channel-section steel 5 is inlayed and is equipped with wear-resisting scraper 6, and wear-resisting scraper 6 adopts wear-resisting polymer plastics to make, has advantages such as anticorrosive, wear-resisting, frictional resistance is little. Scraper bolts 7 are respectively installed at the upper part and the lower part of each U-shaped channel steel 5, the middle parts of the scraper bolts 7 respectively penetrate through scraper waist-shaped grooves 6a of the wear-resistant scrapers 6, and the scraper waist-shaped grooves 6a extend along the radial direction of the barrel 1, so that the wear-resistant scrapers 6 can float in the radial direction.

Wear-resisting scraper 6's upper portion and lower part are equipped with knock pin 8 respectively, the head of knock pin 8 supports respectively and leans on the inner wall at wear-resisting scraper 6, the bottom wall hole of U-shaped channel-section steel 5 is followed in proper order to the shank of knock pin 8, wear out in the centre bore of screwed pipe seat 9 and adjusting nut 11, screwed pipe seat 9 welds on the diapire of U-shaped channel-section steel 5 towards the one end of barrel 1, adjusting nut 11 connects soon at screwed pipe seat 9's the other end, the periphery cover of knock pin 8 is equipped with spring 10, spring 10 is located screwed pipe seat 9's inner chamber and supports between the bottom wall of knock pin head and adjusting nut 11.

The pre-tightening tension of the spring 10 can be adjusted by rotating the adjusting nut 11, and the pre-tightening tension can be properly adjusted according to the centrifugal force of the rotor, the viscosity of the material and the abrasion speed of the scraper, so that the requirements of different materials are met. The tension of the spring 10 pushes the wear-resistant scraper 6 out towards the cylinder wall direction through the top pin 8, and the scraper kidney-shaped groove 6a accommodates the floating of the wear-resistant scraper 6, so that the wear-resistant scraper 6 is tightly attached to the heating wall for scraping a film, no crystal salt is attached, and scaling is avoided; can compensate certain abrasion loss, and the evaporation efficiency is not affected.

The phase difference of the two wear-resistant scraping plates 6 on the same layer is 180 degrees, the wear-resistant scraping plates 6 on the two adjacent layers are staggered, namely the phase difference of the upper and lower wear-resistant scraping plates 6 is 90 degrees, so that the scraping is more uniform.

The end faces, facing the cylinder wall, of the wear-resistant scrapers 6 are uniformly provided with scraper chutes 6b which are parallel to each other and inclined to the horizontal plane, and when the wear-resistant scrapers 6 sweep the heating inner wall, materials are scraped at intervals in the height direction. The scraper chute 6b is inclined downwards along the rotation direction of the wear-resistant scraper 6, and along with the rotation of the wear-resistant scraper 6, the crystal slurry corresponding to the scraper chute 6b is gradually scraped, so that the thickness of a crystal slurry film on a heating wall is thin, the crystal slurry film is spirally downward, and the evaporation efficiency is high.

The main motor 14 drives the main shaft 3 to rotate through the speed reducer 15 and the coupler 16, the crystallized slurry enters the inner cavity of the material distribution section from the feed port 1b symmetrically and tangentially, the material distribution helical blade 12 rotates along with the main shaft 3 to coat the crystallized slurry on the inner wall of the cylinder 1, and the crystallized slurry flows automatically on the heating wall of the evaporation chamber by gravity to form a falling film. Each group of wear-resistant scrapers 6 continuously scrape the falling film under the driving of the main shaft 3, so that the falling film spirally flows downwards; meanwhile, steam enters the inner cavity of the heating jacket 2 from the jacket inlet 2a to heat the falling film on the inner wall of the cylinder body, so that moisture or solvent in the falling film is evaporated, and the evaporated material is discharged from the discharge hole 1c at the bottom of the conical hopper. The low boiling point secondary steam such as water or solvent is evaporated upwards and blocked by the top defoaming rotary plate 13, a small amount of liquid drops carried by the secondary steam are blocked back to the evaporation chamber again, and the purified secondary steam is extracted from the vacuumizing port 1a at the top.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention. In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention. Technical features of the present invention which are not described may be implemented by or using the prior art, and will not be described herein.

Claims

1. A scraper evaporator for treating crystallized slurry comprises a barrel, wherein an evaporation chamber is arranged in the middle section of the barrel, a main shaft is arranged along the axis of the barrel, and the scraper evaporator is characterized in that a plurality of groups of cross supports are arranged in the inner cavity of the evaporation chamber along the height direction of the main shaft, U-shaped channel steel which extends vertically and is provided with an outward opening is connected between the ends of two adjacent layers of the cross supports, wear-resistant scrapers are embedded in the inner cavity of the U-shaped channel steel, scraper bolts are respectively arranged at the upper part and the lower part of each U-shaped channel steel, the middle parts of the scraper bolts respectively penetrate through scraper waist-shaped grooves of the wear-resistant scrapers, ejector pins are respectively arranged at the upper part and the lower part of the wear-resistant scrapers, the heads of the ejector pins respectively abut against the inner walls of the wear-resistant scrapers, pin bodies of the ejector pins sequentially penetrate through bottom wall holes of the U-shaped channel steel, threaded pipe seats and center holes of adjusting nuts, and one ends of the threaded pipe seats facing the barrel are welded on the bottom wall of the U-shaped channel steel, the adjusting nut is screwed at the other end of the threaded pipe seat, a spring is sleeved on the periphery of the ejector pin, and the spring is located in the inner cavity of the threaded pipe seat and supported between the head of the ejector pin and the bottom wall of the adjusting nut.

2. The scraper evaporator for treating a crystallization slurry as set forth in claim 1, wherein the end surfaces of said wear-resistant scrapers facing the cylinder wall are uniformly provided with scraper chutes parallel to each other and inclined to the horizontal plane.

3. The scraper evaporator for treating a crystallization slurry as set forth in claim 1, wherein the wear-resistant scrapers of adjacent two layers are staggered from each other.

4. The scraper evaporator for treating crystallization slurry as claimed in claim 1, wherein a material distribution section is provided above the evaporation chamber, material inlets for feeding material in a tangential direction are symmetrically provided on a cylinder wall of the material distribution section, and material distribution helical blades are uniformly provided in an inner cavity of the cylinder of the material distribution section, and the material distribution helical blades are fixedly connected to the main shaft.

5. The scraped surface evaporator for treating a crystallization slurry according to claim 4, wherein a vacuum port is provided in a top side wall of the barrel, and a defoaming plate is provided between the vacuum port and the cloth section, and the defoaming plate is fixed to the main shaft.