CN216678211U

CN216678211U - Reaction kettle

Info

Publication number: CN216678211U
Application number: CN202122791317.XU
Authority: CN
Inventors: 章毅; 曹彩丹
Original assignee: Shenzhen Shinemax Advanced Materials Technology Co ltd
Current assignee: Shenzhen Shinemax Advanced Materials Technology Co ltd
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2022-06-07
Anticipated expiration: 2031-11-15

Abstract

The utility model discloses a reaction kettle, which comprises a barrel, wherein double stirring paddles are coaxially arranged in the barrel up and down, the upper paddle is a three-blade paddle, and the three-blade paddle inclines downwards and forms an included angle with the horizontal plane; the lower layer of the paddle is a cross paddle, the upper side part of each paddle is a rigid part, and the lower side part of each paddle is a flexible part which is movably connected. The utility model adopts a double-layer stirring structure, improves the stirring efficiency, accelerates the reaction speed, shortens the reaction time, improves the concentration of the liquid, and can use less solvent as the carrier solvent. Energy conservation and environmental protection, greatly reduces the production cost and is beneficial to industrial production.

Description

Reaction kettle

Technical Field

The utility model relates to the technical field of preparation of aluminum pigments, in particular to large-scale production equipment for preparing a coated water-based aluminum pigment.

Background

The aluminum pigment is a metallic pigment with a silver element type or corn flake type structure, silvery white and bright surface and double-color effect, and is widely applied to industries such as industrial coatings, automobile coatings, building indoor and outdoor decoration coatings, printing ink and the like. With the enhancement of the environmental awareness of people and various national emerging environmental policies, the traditional oily aluminum pigment cannot meet the requirements of downstream customers, and in recent years, the water-based aluminum pigment technology has made a breakthrough progress and is gradually occupying the market.

At present, the silica-coated water-based aluminum pigment or the inorganic-organic hybrid modified water-based aluminum pigment is the mainstream technical development direction. In the existing process for preparing the coated water-based aluminum pigment, a key device, namely a reaction kettle, is required. Namely, the reaction vessel is used as a container for carrying various raw materials, as a tool for stirring and mixing the raw materials, efficiently dispersing the raw materials, as a holding place for ensuring the quality of each process reaction between the raw materials, and the like. However, the existing reaction kettle is unreasonable in structural design and low in stirring efficiency during working, so that the liquid flow efficiency is low, the reaction time between raw materials is long, the solvent dosage is large, the production cost is high, energy conservation and environmental protection are avoided, and the industrial production is not facilitated.

Therefore, how to overcome the defects of low stirring efficiency, low liquid flowing efficiency, long reaction time between raw materials and large solvent consumption of the existing reaction kettle is a problem to be solved in the industry.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problems of the existing reaction kettle, and provides the reaction kettle with a special structure, so that the stirring efficiency and the liquid flowing efficiency are improved, the reaction time between raw materials is shortened, the using amount of a solvent in the preparation process can be reduced, the energy is saved, the environment is protected, and the industrial production is facilitated.

The utility model provides a reaction kettle, which comprises a barrel, wherein double stirring paddles are coaxially arranged in the barrel up and down, and the upper paddle is a three-blade paddle which inclines downwards and forms an included angle with the horizontal plane; the lower layer of paddle is a cross paddle, the upper side part of each paddle is a rigid part, and the lower side part of each paddle is a flexible scraper which is movably connected.

Preferably, the three-blade paddle inclines downwards to form an included angle of 45 degrees with the horizontal plane.

Preferably, the upper side part of the paddle of the cross paddle is a stainless steel component, and the lower side part of the paddle is a polytetrafluoroethylene scraper.

Preferably, the inner wall of the cylinder body is separately provided with two longitudinal baffles.

Preferably, the cylinder is of a jacket structure, and a coil is arranged in the jacket.

Preferably, the bottom of the cylinder body is provided with a roller.

The reaction kettle with double stirring blades can greatly improve the flowing efficiency of liquid so as to improve the stirring efficiency and the reaction speed. So that the concentration of the liquid can be increased, i.e. less solvent can be used as carrier solvent, and the reaction time between the starting materials can be greatly shortened. Therefore, the method is energy-saving and environment-friendly, greatly reduces the production cost and is beneficial to industrial production.

Drawings

FIG. 1 is a schematic structural view of an embodiment of a reaction vessel according to the present invention.

Detailed Description

The utility model will be further illustrated with reference to the following examples and the accompanying drawings:

as shown in fig. 1, the present invention provides an example of a reaction vessel for preparing an aqueous aluminum pigment. The reaction kettle comprises a barrel 1 of the reaction kettle, wherein the barrel is of a jacket structure, and a layer of coil pipe 2 is wound in the jacket; double stirring paddles are coaxially arranged in the barrel body 1 from top to bottom, the upper paddle 3 is a three-blade paddle and is uniformly arranged along the circumference, and the three-blade paddle is inclined downwards and forms an included angle of 45 degrees with the horizontal plane; the lower layer of paddle is a cross paddle 4, the upper part of the paddle is made of stainless steel, and the lower part of the paddle is an elastic scraper 5 which is movably connected. And two longitudinal baffles 6 are arranged on the left side and the right side of the inner wall of the cylinder body.

Referring to FIG. 1, cooling water may be introduced into the interlayer of the reaction kettle for cooling. And the coil pipe 2 in the interlayer is used for circulating heat conducting oil so as to heat the reaction kettle. The inner wall of the reaction kettle body is provided with a second baffle 6, so that liquid can flow in a turbulent flow manner during stirring, and the exchange speed of the liquid is improved. The upper layer of paddles 3 arranged in the reaction kettle are three-blade 45-degree oblique pushing type paddles, and when the main shaft of the utility model rotates, the upper layer of paddles 3 can push the solution downwards. The polytetrafluoroethylene scraper plate 5 is arranged below the stainless steel blade of the lower cross paddle 4, so that deposited materials can be scraped and stirred.

The reaction kettle provided by the utility model is adopted to carry out coating treatment on the water-based aluminum pigment, and the stirring mode of double-layer blades and baffles is adopted, so that the stirring requirements of different viscosities can be met, and the phenomenon that the aluminum pigment is agglomerated due to insufficient stirring force when the viscosity of the liquid is suddenly changed is prevented. The movable polytetrafluoroethylene scraper blade arranged below the stainless steel blade of the lower blade can prevent silver paste from depositing at the bottom. The double-layer stirring mode improves the stirring efficiency, accelerates the reaction speed, shortens the reaction time, improves the concentration of liquid, and can use less solvent as a carrier solvent. Energy saving and environmental protection, greatly reduces the production cost and is beneficial to industrial production.

Tests were conducted on aqueous aluminum pigments prepared by a suitable preparation process and the reaction kettle provided by the present invention, and the test results were as follows:

1. particle size data:

the particle size data of the aqueous aluminum pigment was measured using a BT-9300SE particle sizer. See the particle size data before and after coating with aluminum pigment in the following table:

	D10	D50	D90
				particle size before coating	9.145μm	15.28μm	22.93μm
Particle size after coating	10.07μm	16.37μm	23.64μm

From the data, after coating, D10, D50 and D90 are respectively increased by about 1 micron, the change of the whole grain diameter is small, and the situation that small pieces are adhered to large pieces in a flake shape and the phenomenon that the grains are agglomerated does not occur.

2. And (4) displaying by a microscope:

from the microscopic photograph of the water-based aluminum pigment, the flake is an aluminum flake (aluminum pigment), and the aluminum pigment has a flat flake surface, smooth edge and uniform coating, and fine flakes are not adhered to the large aluminum pigment and adhesion among the large aluminum pigments is not generated. The aqueous aluminum pigment is used in paints and inks and is characterized by high hiding power and high brightness.

3. Gas evolution test:

in order to test the stability of the aluminum pigment in the paint, 12g of the aqueous aluminum pigment prepared using the reaction vessel of the present invention, 12g of butyl cellosolve, and 176g of an aqueous varnish resin were mixed by stirring to be uniform to obtain a sample paint. Transferring the coating into a gas generating device, sealing the bottle mouth with a sealing film, injecting water into the bottle from the bottle cap of the gas generating device to a horizontal opening, placing the bottle into a 50 ℃ oven, and balancing for six hours. After six hours, uniformly coating sealing silica gel on the ground part of the bottle cap, screwing the bottle cap into the bottle body, rotating for one circle to ensure complete sealing, fastening by using a lock catch, and screwing the top cover. Gas evolution data (ml) were recorded every 24 hours for 7 consecutive days as shown in the following table:

it can be seen that the gas evolution data recorded cumulatively for seven days is 0.5ml, which indicates that the gas evolution of the coating is small, i.e., the water-based aluminum pigment has good stability in the coating, and no discoloration or can swelling occurs.

In conclusion, the water-based aluminum pigment produced by the reaction kettle has good performance.

While the present invention has been described in detail with reference to the embodiments, those skilled in the art may make various changes or modifications to the embodiments, and such changes and modifications should fall within the scope of the present invention.

Claims

1. A reaction kettle comprises a cylinder body and is characterized in that double stirring paddles are coaxially arranged in the cylinder body up and down, the upper layer of paddle is a three-blade paddle, and the three-blade paddle inclines downwards and forms an included angle with the horizontal plane; the lower layer of paddle is a cross paddle, the upper side part of each paddle is a rigid part, and the lower side part of each paddle is a flexible scraper which is movably connected.

2. The reactor of claim 1 wherein said three-bladed paddles slope downwardly at a 45 ° angle to the horizontal.

3. The reactor of claim 1, wherein the upper side of the cross paddle is a stainless steel member and the lower side of the paddle is a teflon scraper.

4. The reactor of claim 1 wherein said interior wall of said vessel is divided into two longitudinal baffles.

5. The reactor of claim 1, wherein the cylinder is a jacket structure, and a coil is arranged in the jacket.

6. The reactor of claim 1, wherein the bottom of the cylinder is provided with rollers.