CN213835131U

CN213835131U - ABS graft latex's coagulation system

Info

Publication number: CN213835131U
Application number: CN202022353998.7U
Authority: CN
Inventors: 孙士昌; 王珺; 郑思明; 林昊健; 王金娥; 田锋; 王玉刚; 刘冲; 刘玉宝
Original assignee: Liaoning Baolai New Material Co ltd
Current assignee: Liaoning Jinfa Technology Co ltd
Priority date: 2020-10-21
Filing date: 2020-10-21
Publication date: 2021-07-30
Anticipated expiration: 2030-10-21

Abstract

The utility model relates to a coagulation system of ABS grafting latex, the device is a static mixing four-section control by temperature change loop pipe formula continuous reaction device, including mixing section, dispersion section, water conservancy diversion section and four continuous parts of curing section, the mixing section is the column body that length-diameter ratio (L1: D1) is (5-10:1), and its inside is provided with static mixing dispersion impeller, the dispersion end is that the arc cavity is cylindric, and the arc angle is 120-145 °, the water conservancy diversion section is the pipe chute form distribution dish, the curing section is that the cavity is cylindric, and length-diameter ratio (L4: D4) is (1-3: 1). Adopt utility model's condensing equipment, it is short to have the process flow of condensing, need not to rotate the stirring, and it is even to condense out the powder particle, can realize continuous production.

Description

ABS graft latex's coagulation system

Technical Field

The utility model belongs to the technical field of ABS synthetic resin production technology, a device that condenses of ABS grafting latex is related to, especially relate to a four sections control by temperature change loop pipe formula continuous reaction unit of static mixing.

Background

The ABS resin is a thermoplastic resin material prepared by copolymerizing three monomers, namely butadiene, styrene and acrylonitrile, has the characteristics of rubber and resin, has better comprehensive mechanical properties, is wide in application field, and is an important engineering high polymer material. The emulsion grafting-bulk SAN blending method is the most widely applied process technology for ABS resin production at present, and the method adopts emulsion polymerization technology to produce polydiene latex, then graft-copolymerizes the polydiene latex with styrene and acrylonitrile to prepare ABS graft latex, then utilizes coagulation and drying process technology to prepare the ABS graft latex into ABS graft powder, and mixes the ABS graft powder with SAN resin to extrude and produce ABS resin, and the coagulation process is the process of separating solid matters from liquid phase in the ABS graft latex. Usually, ABS agglomeration is performed by adopting multi-kettle series semi-continuous production, because the volume of a single kettle is large, an agglomerating agent is added, materials are mixed unevenly, operating parameters of each kettle are different, the particle size distribution of agglomerated ABS powder is uneven, the stability of a downstream process is influenced, and the performance of a final ABS resin product is fluctuated due to uneven particle distribution.

Disclosure of Invention

The utility model discloses change traditional ABS and condense the process method, provide a static mixing four sections control by temperature change loop pipe formula and condense reaction unit in succession, and the method of production uniform particle diameter ABS powder.

The technical scheme of the utility model as follows:

an ABS graft latex coagulation device comprises four continuous parts, namely a mixing section, a dispersing section, a flow guide section and a curing section, wherein the mixing section is a columnar pipe body with the length-diameter ratio (L1: D1) of (5-10:1), a static mixing dispersion disc is arranged in the mixing section, the dispersing section is an arc-shaped hollow cylinder, the arc angle is 120-145 degrees, the flow guide section is an inclined-pipe-shaped distribution disc, the curing section is a hollow cylinder, and the length-diameter ratio (L4: D4) is (1-3: 1).

The static mixing dispersion plate of the mixing section is arranged in a cross shape by adopting a single layer of stainless steel sheets, and each layer is arranged in a staggered mode.

The flow guide section inclined tubular distribution disc is formed by tightly arranging hexagonal steel pipes.

The port of the mixing section is a material inlet.

The mixing section, the dispersing section, the flow guide section and the curing section are all provided with steam inlets.

And a discharge port is arranged at the tail end of the curing section.

The ABS graft latex coagulating method using the ABS graft latex coagulating device comprises the steps of adding the ABS graft latex, a coagulating agent and desalted water into a ring-tube type reactor according to the mass ratio of (0.001-0.005): 0.2-1) of the ABS graft latex on a dry basis, controlling the temperature by adjusting the steam flow, and controlling the internal temperature of a mixing section to be 60-80 ℃; controlling the internal temperature of the dispersion section to be 75-85 ℃; controlling the temperature of the flow guide section to be 80-95 ℃; controlling the temperature of the curing section to be 80-95 ℃.

Wherein the coagulant is a mixture of multivalent metal ion strong acid salt or multivalent metal ion strong acid salt and medium strong acid with concentration of 10-40%, including MgSO₄Solution, MgSO₄Mixed solution with acetic acid, MgSO₄Mixed with sulfuric acid, CaCl₂Solution, CaCl₂Mixed with acetic acid, CaCl₂Mixed with sulfuric acid, H₂SO₄One of the solutions.

As an optimization scheme, static mixing is adopted in the method, and the flow velocity of static mixed materials is 2-5 m/s.

The beneficial effects of the utility model, adopt the utility model discloses a device is with ABS grafting latex condensation powdering, adopts static mixing four sections accuse temperature ring tubular coacervation technology, need not the stirring, and no rotating equipment breaks through traditional intermittent type formula reation kettle coacervation technology, can realize continuous coacervation production, avoids ABS powder particle size and outward appearance difference between in batches, and ABS powder particle size and outward appearance colour homogeneous after agglomerating.

Drawings

FIG. 1 is a front view of a coagulation apparatus for ABS graft latex according to the present invention.

FIG. 2 is a top view of the mixing section static mixing dispersion plate of the coagulation device for ABS graft latex of the present invention.

FIG. 3 is a top view of a diversion section inclined tube distribution plate of a coagulation device for ABS graft latex according to the present invention.

In the figure: ABS graft latex feed inlet A, coagulant feed inlet B, desalted water feed inlet C, steam inlet D, steam inlet E, steam inlet F, steam inlet G, steam inlet H, ABS slurry feed outlet I.

1 mixing section, 2 dispersing section, 3 solidifying section, 4 curing section, 5 static mixing dispersing disc and 6 inclined tube distributing disc.

Detailed Description

Other features, objects and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments thereof, which proceeds with reference to the accompanying drawings.

As shown in FIGS. 1-3, the utility model provides a static mixing four-section temperature control loop type continuous reaction device for ABS graft latex coagulation, which comprises four continuous parts of a mixing section 1, a dispersing section 2, a diversion section 3 and a curing section 4. The mixing section 1 is a columnar pipe body with the length-diameter ratio (L1: D1) of (5-10:1), a static mixing dispersion disc 5 is arranged in the mixing section 1, the stainless steel sheets are distributed in a single-layer cross shape, the stainless steel sheets are arranged in a staggered mode among layers, the stainless steel sheets can efficiently shear ABS slurry, and the staggered distribution can change the direction of fluid to achieve the purpose of rapid dispersion. The dispersion section is cylindrical with an arc-shaped cavity, and the arc angle is 120-145 degrees. The guide flow section is an inclined tubular distribution disc 6, the inside of the guide flow section is a hexagonal steel pipe with the diameter of 50mm, the guide flow section is closely arranged, the dispersed slurry enables the flow direction of the fluid to be uniform through the guide flow section runner, and the fluid is guaranteed to stably enter the curing section to form spiral rising and discharge after being sufficiently cured. The curing section is in a hollow cylindrical shape, and the length-diameter ratio (L4: D4) is (1-3: 1).

The port of the mixing section is a material inlet, ABS graft latex, a coagulant and desalted water are added into the reaction device from the port, the mixing section, the dispersing section, the flow guide section and the curing section are all provided with steam inlets for controlling the temperature of each section, the tail end of the curing section is provided with a discharge hole, and ABS slurry is discharged from the discharge hole.

Example 1

ABS graft latex solid content 40%, coagulant 10% MgSO₄Adding the solution and desalted water into a ring-tube reactor according to the ratio of 1:0.001:0.2 and the flow rate of 2m/s, adjusting the steam flow, controlling the temperature of a mixing section to be 60 ℃, the temperature of a dispersing section to be 75 ℃, the temperature of a curing section to be 85 ℃, the temperature of a curing section to be 95 ℃, and measuring the particle size distribution of the ABS slurry at the discharge port of the coagulation device, wherein the particle size distribution is shown in Table 1.

Example 2

ABS graft latex solid content 45%, coagulant 15% MgSO₄The mixed solution and acetic acid, desalted water were added into a loop reactor at a flow rate of 3m/s at a ratio of 1:0.002:0.3, the steam flow was adjusted, the temperature of the mixing section was controlled to 70 ℃, the temperature of the dispersing section was controlled to 85 ℃, the temperature of the curing section was controlled to 90 ℃, the temperature of the aging section was controlled to 92 ℃, and the measured particle size distribution of the ABS slurry at the discharge port of the coagulation apparatus is shown in Table 1.

Example 3

50 percent of solid content of ABS graft latex and 20 percent of CaCl of coagulant₂Adding the solution and desalted water into a ring-tube reactor according to the ratio of 1:0.003:0.5 and the flow rate of 5m/s, adjusting the steam flow, controlling the temperature of a mixing section to be 70 ℃, the temperature of a dispersing section to be 85 ℃, the temperature of a curing section to be 92 ℃, the temperature of a curing section to be 95 ℃, and measuring the particle size distribution of the ABS slurry at the discharge port of the coagulation device, wherein the particle size distribution is shown in Table 1.

Example 4

40 percent of solid content of ABS graft latex and 30 percent of CaCl of coagulant₂The solution and the sulfuric acid mixed solution, desalted water were added into the loop reactor at a flow rate of 4m/s at a ratio of 1:0.004:0.8, the steam flow was adjusted, the temperature of the mixing section was controlled at 72 ℃, the temperature of the dispersing section at 80 ℃, the temperature of the curing section at 85 ℃, the temperature of the aging section at 95 ℃, and the measured particle size distribution of the ABS slurry at the discharge port of the coagulation apparatus is shown in Table 1.

Example 5

The ABS graft latex has a solid content of 43 percent, a coagulant of 40 percent of sulfuric acid solution and desalted water are added into a loop reactor according to a ratio of 1:0.005:1 and a flow rate of 3m/s, the steam flow is adjusted, the temperature of a mixing section is controlled to be 75 ℃, the temperature of a dispersing section is controlled to be 85 ℃, the temperature of a curing section is controlled to be 90 ℃, the temperature of a curing section is controlled to be 95 ℃, and the measured particle size distribution of the ABS slurry at the discharge port of the coagulation device is shown in Table 1.

TABLE 1 ABS sizing agent particle size distribution Table

Claims

1. The ABS graft latex coagulation device is characterized by comprising four continuous parts, namely a mixing section, a dispersing section, a flow guide section and a curing section, wherein the mixing section is a columnar pipe body with the length-diameter ratio L1: D1 of 5-10:1, a static mixing dispersion disc is arranged in the mixing section, the dispersing section is an arc-shaped hollow cylinder, the arc angle is 120-145 degrees, the flow guide section is an inclined-pipe-shaped distribution disc, the curing section is a hollow cylinder, and the length-diameter ratio L4: D4 is 1-3: 1.

2. The ABS graft latex agglomerating device as claimed in claim 1, wherein the static mixing and dispersing disks of the mixing section are arranged in a single-layer cross-shaped arrangement with stainless steel sheets, and the layers are arranged in a staggered manner.

3. The coagulating device for ABS graft latex according to claim 2, wherein said oblique tubular distribution disk of the flow guide section is formed by closely arranging hexagonal steel tubes.

4. The coagulation apparatus of claim 3, wherein the port of the mixing section is a material inlet.

5. The apparatus for coagulating ABS graft latex according to claim 4, wherein said mixing section, dispersing section, diverting section and maturing section are provided with steam inlets.

6. The coagulating apparatus for ABS graft latex according to claim 5, wherein the end of said maturing section is provided with a discharge port.