Mixing drum type film evaporator

Abstract

The utility model relates to the technical field of film evaporators, and provides a mixing drum type film evaporator which comprises an evaporation drum body, a main shaft is rotatably arranged in the evaporation drum body, a plurality of transverse connecting plates are arranged on the main shaft at intervals in the axis direction, scraping plates are arranged on the connecting plates, and one side of each scraping plate is attached to the inner wall of the evaporation drum body. The shell is vertically arranged on the connecting plate, the scraper blade is arranged on the shell in a lifting mode, and the scraper blade is arranged on the connecting plate through the shell; the roller is rotationally arranged on the shell and rolls on the inner wall of the evaporation barrel; the transmission shaft is rotationally arranged on the shell and located beside the scraper, a transmission part is arranged on the transmission shaft, and the roller drives the transmission shaft to rotate; the transmission part is arranged on the scraper, is in transmission with the transmission part and is used for driving the scraper to lift. By means of the technical scheme, the problem that in the prior art, a scraping plate cannot achieve a good cleaning effect or a good film scraping effect on a local area all the time is solved.

Description

Technical Field

[0001] This utility model relates to the field of thin film evaporator technology, and in particular to a mixing cylinder type thin film evaporator. Background Technology

[0002] In the distillation process of hydrazine hydrate, the mother liquor is preheated and then transported to a thin-film evaporator for distribution, film formation, and evaporation. It is then further separated in a distillation column to finally obtain a high-concentration hydrazine hydrate product.

[0003] Currently, scraper-type thin-film evaporators are used, with scrapers distributed on the main shaft. Several scrapers can cover the inner wall of the evaporator cylinder when rotating. Generally, the scrapers are fixedly installed, rotating in the circumferential direction and relatively fixed in the axial direction. Depending on different production conditions, the scrapers are connected to the main shaft through elastic or rigid connections. The scrapers can scrape or clean the inner wall of the evaporator cylinder. However, with the existing rotation method, the contact between the scraper and the inner wall of the cylinder is unstable. Due to fit or local structural reasons, there may be gaps between the scraper and the inner wall of the cylinder in some areas. Moreover, during stable circumferential rotation, the gaps in local areas always exist, which means that a good cleaning or scraping effect cannot be achieved in local areas.

[0004] The problem that existing technologies cannot achieve good cleaning or film-scraping effects in localized areas needs to be addressed. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a mixing cylindrical thin film evaporator in response to the above-mentioned technical deficiencies. This solves the problem in the prior art that the scraper can never achieve a good cleaning effect or film scraping effect in local areas.

[0006] The technical solution adopted by this utility model is as follows: A mixing cylindrical thin-film evaporator is provided, comprising an evaporation cylinder, a main shaft rotatably mounted inside the evaporation cylinder, and a plurality of transverse connecting plates spaced at intervals along the axial direction on the main shaft. A scraper is mounted on the connecting plates, with one side of the scraper adhering to the inner wall of the evaporation cylinder; characterized in that it further comprises:

[0007] The outer casing is vertically mounted on the connecting plate, and the scraper is lifted and lowered on the outer casing. The scraper is mounted on the connecting plate through the outer casing.

[0008] A roller is rotatably mounted on the outer casing and rolls on the inner wall of the evaporator cylinder.

[0009] A drive shaft is rotatably mounted on the housing and located next to the scraper. The drive shaft has a transmission part, and the roller drives the drive shaft to rotate.

[0010] A transmission part is arranged on the scraper and is in transmission with the transmission part, and is used to drive the scraper to lift and lower.

[0011] Further optimization of the technical solution, the transmission part is a reciprocating screw structure, and the transmission part is a sliding block in transmission cooperation with the reciprocating screw structure.

[0012] Further optimization of the technical solution, further comprising:

[0013] A main gear is coaxially arranged on the roller;

[0014] A transmission gear is arranged on the transmission shaft and is in meshing transmission with the main gear, and the roller drives the transmission shaft to rotate through the main gear and the transmission gear.

[0015] Further optimization of the technical solution, the shell has a vertically arranged guide groove inside, and further comprising:

[0016] A lifting seat with a "C" type transverse section is arranged in the guide groove, one side of the scraper is clamped in the lifting seat, the transmission part is arranged on the lifting seat, and the transmission part is arranged on the scraper through the lifting seat.

[0017] Further optimization of the technical solution, the roller is located at one end in the shell, and the end of the shell has a plurality of vertically arranged insertion grooves along the annular, and further comprising:

[0018] A plurality of scraping pieces are inserted into the insertion grooves, and one side of the scraping piece is attached to the circumferential side surface of the roller.

[0019] Further optimization of the technical solution,

[0020] The roller has two, and one of the rollers is rotatably arranged on the upper and lower sides of the shell, and the two rollers simultaneously drive the transmission shaft to rotate.

[0021] The beneficial effects of the utility model lie in:

[0022] 1. The scraper can rotate circumferentially and lift and lower at the same time, change the corresponding relationship between the scraper and the inner wall of the evaporation cylinder, reduce or avoid the problem that the local area cannot be effectively contacted all the time, and at the same time, the circumferential rotation cooperates with the reciprocating short-distance lifting to produce a better cleaning effect.

[0023] 2. The roller provides power through rolling on the evaporation cylinder, drives the scraper to lift and lower, does not need a motor or a hydraulic part to drive, does not need a complex circuit design, and has a simple structure. DRAWINGS

[0024] Figure 1A schematic diagram of a prior art structure for a thin film evaporator;

[0025] Figure 2 A schematic diagram of the structure of the present application;

[0026] Figure 3 A schematic diagram of the side view structure of the present application;

[0027] Figure 4 A schematic diagram of the top view structure of the present application; Figure 3 A schematic diagram of the A-A position cross-sectional structure of the present application;

[0028] Figure 5 A schematic diagram of the top view structure of the present application;

[0029] Figure 6 A schematic diagram of the top view structure of the present application; Figure 5 A schematic diagram of the B-B position cross-sectional structure of the present application;

[0030] Figure 7 A schematic diagram of the lifting seat structure of the present application;

[0031] Marking in the figure: 1, evaporation cylinder; 101, main shaft; 102, connecting plate; 2, scraper; 3, shell; 301, guide groove; 302, insertion groove; 303, connecting lug; 4, roller; 401, main gear; 5, transmission shaft; 501, transmission part; 5011, reciprocating screw structure; 502, transmission gear; 6, lifting seat; 601, transmission part; 6011, sliding block; 7, scraper. DETAILED DESCRIPTION

[0032] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0033] In order to make the drawing simple, only the parts related to the present application are schematically shown in each drawing, which does not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some drawings, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this text, "one" not only means "only one", but also can mean "more than one", and "several" includes "two" and "more than two".

[0034] In this text, it is necessary to point out that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting" and "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In addition, in the description of the present application, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0036] As shown in Figures 1-7 A mixed cylinder type thin film evaporator, comprising an evaporation cylinder 1, a main shaft 101 is rotatably arranged in the evaporation cylinder 1, a plurality of transverse connecting plates 102 are arranged on the main shaft 101 along the axis direction, a scraper 2 is arranged on the connecting plate 102, and one side of the scraper 2 is attached to the inner wall of the evaporation cylinder 1; an outer shell 3 is vertically arranged on the connecting plate 102, the scraper 2 is arranged on the outer shell 3, and the scraper 2 is arranged on the connecting plate 102 through the outer shell 3; a roller 4 is rotatably arranged on the outer shell 3, and the roller 4 rolls on the inner wall of the evaporation cylinder 1; a transmission shaft 5 is rotatably arranged on the outer shell 3 and located beside the scraper 2, the transmission shaft 5 has a transmission part 501, and the roller 4 drives the transmission shaft 5 to rotate; a transmission member 601 is arranged on the scraper 2 and drives the transmission part 501 to drive the scraper 2 to ascend and descend. The roller 4 has two, one roller 4 is rotatably arranged on the upper and lower sides of the outer shell 3, and the two rollers 4 simultaneously drive the transmission shaft 5 to rotate.

[0037] In use, the main shaft 101 rotates to drive the outer shell 3 to rotate circumferentially inside the evaporation cylinder 1 through the connecting plate 102, and the scraper 2 is attached to the inner wall of the evaporation cylinder 1 for film scraping or cleaning. The roller 4 rolls against the inner wall of the evaporation cylinder 1, and when the main shaft 101 rotates, the roller 4 rotates to generate power to drive the transmission shaft 5 to rotate, and the transmission part 501 and the transmission member 601 are driven to reciprocatingly ascend and descend the scraper 2, and the ascending and descending amplitude is small. The transmission part 501 and the transmission member 601 can be existing reciprocating screw drive mechanisms or cam drive mechanisms.

[0038] During the reciprocating ascent and descent of the scraper 2, there are interval covered areas on the upper and lower sides, and the middle part is always covered, and the use covered area can be set as an evaporation area to maintain the best film scraping or cleaning effect.

[0039] The cooperation structure of the concave-convex lines between the roller 4 and the inner wall of the evaporation cylinder 1 can make the roller 4 provide greater rotating driving force to provide stable rotating driving force to the transmission shaft 5. The roller 4 can be arranged on the upper and lower sides of the outer shell 3 to make the rotating driving force greater. The rolling of the roller 4 and the inner wall of the evaporation cylinder 1 can be intermittent or have a small amount of slip, which breaks the periodic rotation, avoids the fixed ascending and descending route, makes the relative position of the scraper 2 and the inner wall of the evaporation cylinder 1 more random, and better reduces the problem of poor film scraping or cleaning in local areas.

[0040] The cooperation structure of the concave-convex lines between the roller 4 and the inner wall of the evaporation cylinder 1 can make the roller 4 provide greater rotating driving force to provide stable rotating driving force to the transmission shaft 5. The roller 4 can be arranged on the upper and lower sides of the outer shell 3 to make the rotating driving force greater. The rolling of the roller 4 and the inner wall of the evaporation cylinder 1 can be intermittent or have a small amount of slip, which breaks the periodic rotation, avoids the fixed ascending and descending route, makes the relative position of the scraper 2 and the inner wall of the evaporation cylinder 1 more random, and better reduces the problem of poor film scraping or cleaning in local areas. Figure 1The existing thin film evaporator structure diagram, part of the perspective structure, can be observed inside the scraper 2 distribution and the connection form of the main shaft 101.

[0041] Further, the transmission part 501 is a reciprocating screw structure 5011, and the transmission member 601 is a sliding block 6011 matched with the reciprocating screw structure 5011.

[0042] In use, the transmission part 501 adopts the reciprocating screw structure 5011, and the sliding block 6011 can automatically reverse during the unidirectional rotation of the main shaft 101 within a certain stroke, realizing reciprocating lifting, which is simple and stable in structure and stable in lifting. Of course, it can also be driven by a cam mechanism, such as the transmission part 501 being disc-shaped, the surface in the axial direction having convex and concave parts, and the transmission member 601 being a connecting rod fitted on the surface of the convex and concave parts, the convex and concave structure constantly changing the contact with the connecting rod to make the connecting rod lift.

[0043] Further, it further comprises a main gear 401 coaxially arranged on the roller 4, and a transmission gear 502 arranged on the transmission shaft 5 and meshing with the main gear 401 to drive the transmission shaft 5 to rotate.

[0044] In use, the roller 4 can be directly coaxially connected with the transmission shaft 5 to drive the transmission shaft 5 to rotate, but at this time, since the transmission shaft 5 is located beside the scraper 2, and the roller 4 rolls against the inner wall of the evaporation cylinder 1, the roller 4 needs to be coaxial with the transmission shaft 5, so the diameter of the roller 4 needs to be larger. The roller 4 can also drive the transmission shaft 5 to rotate through a gear transmission structure, and the main gear 401 and the transmission gear 502 can also be driven to realize the setting of lifting speed or lowering speed.

[0045] Further, the inside of the shell 3 has a vertically arranged guide groove 301, and further comprises a lifting seat 6 with a "C" type transverse cross section, which is arranged in the guide groove 301, and one side of the scraper 2 is clamped in the inside of the lifting seat 6, and the transmission member 601 is arranged on the lifting seat 6, and the transmission member 601 is arranged on the scraper 2 through the lifting seat 6.

[0046] In use, the lifting seat 6 is arranged, and the outer surface is arc-shaped, which can be lifted more smoothly in the guide groove 301, reducing resistance, and at the same time, the scraper 2 can be stably clamped on one side of the lifting seat 6. The shell 3 has connecting ears 303 on the upper and lower sides, which can be installed and connected with the connecting plate 102 through screws or bolts.

[0047] Further, the roller 4 is located at one end of the shell 3, and the end of the shell 3 has a plurality of vertically arranged insertion grooves 302 along the ring, and further comprises a plurality of scraping pieces 7, which are inserted into the insertion grooves 302, and one side of the scraping piece 7 is fitted to the circumferential side surface of the roller 4.

[0048] In use, the wiper 7 can clean the surface of the roller 4, reducing the problem of residual dirt and the like on the surface of the roller 4. By providing a plurality of wipers 7 on the periphery, the use time can be prolonged. The wiper 7 can be thin in structure, avoiding excessive cleaning resistance. The wiper 7 is inserted into the slot 302 and can be positioned by friction or by cooperating with a positioning insertion structure.

[0049] It can be understood that the utility model is described through some embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the utility model. In addition, under the guidance of the utility model, these features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application belong to the scope protected by the utility model.

Claims

1. A hybrid cylinder thin film evaporator, comprising an evaporation cylinder (1), a main shaft (101) is arranged in rotation in the evaporation cylinder (1), a plurality of transverse connecting plates (102) are arranged in the axial direction on the main shaft (101), a scraper (2) is arranged on the connecting plate (102), and one side of the scraper (2) is attached to the inner wall of the evaporation cylinder (1); characterized in that, Also include: The shell (3) is vertically arranged on the connecting plate (102), and the scraper (2) is vertically arranged on the shell (3), and the scraper (2) is arranged on the connecting plate (102) through the shell (3); Roller (4), rotationally arranged on the shell (3), the roller (4) rolls on the inner wall of the evaporation cylinder (1); Transmission shaft (5), rotationally arranged on the shell (3), and located beside the scraper (2), the transmission shaft (5) has a transmission part (501), the roller (4) drives the transmission shaft (5) to rotate; Transmission member (601), arranged on the scraper (2), in transmission with the transmission part (501), for driving the scraper (2) to lift.

2. A hybrid drum thin film evaporator as claimed in claim 1 wherein, The transmission part (501) is a reciprocating screw structure (5011), and the transmission member (601) is a sliding block (6011) in transmission cooperation with the reciprocating screw structure (5011).

3. A hybrid drum thin film evaporator as claimed in claim 1, wherein, Also include: Main gear (401), coaxially arranged on the roller (4); Transmission gear (502), arranged on the transmission shaft (5), and in meshing transmission with the main gear (401), the roller (4) drives the transmission shaft (5) to rotate through the main gear (401) and the transmission gear (502).

4. The hybrid cylinder thin film evaporator of claim 1, wherein, The shell (3) has a vertical guide groove (301) inside, and also includes: Lifting seat (6), the horizontal cross section is "C" type, vertically arranged in the guide groove (301), one side of the scraper (2) is clamped in the lifting seat (6), the transmission member (601) is arranged on the lifting seat (6), and the transmission member (601) is arranged on the scraper (2) through the lifting seat (6).

5. The hybrid cylinder thin film evaporator as claimed in claim 1, wherein, The roller (4) is located at one end of the shell (3), and the end of the shell (3) has a plurality of vertical insertion grooves (302) along the annular, and also includes: Scraping piece (7), has a plurality of, the scraping piece (7) is inserted into the insertion groove (302), and one side of the scraping piece (7) is attached to the circumferential side of the roller (4).

6. The mixed cylinder type thin film evaporator according to any one of claims 1-5, wherein The roller (4) has two, one of the roller (4) is rotationally arranged on the upper and lower sides of the shell (3), and the two rollers (4) drive the transmission shaft (5) to rotate simultaneously.

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