CN203128470U - Intensive powder surface modification device - Google Patents

Abstract

The utility model discloses an intensive powder surface modification device. The intensive powder surface modification device comprises a modification machine, wherein a discharging port of the modification machine is sequentially communicated with a degglomerator through a pipeline, and a feeding port of the modification machine is communicated with a raw material feeding device and a modifying agent feeding device. The utility model also discloses an intensive powder surface modification production process. The intensive powder surface modification production process comprises the steps of: 1. raw material metering and conveying; 2. modifying agent metering and conveying; 3. modification; 4. degglomeration; and 5. collection. By adopting the scheme, the practice shows that a modification production line after the intensive improvement achieves the purposes of stable process, high coating rate, and low dosage of a modifying agent.

Description

An intensive powder surface modification device

technical field

The utility model relates to a modification production line that simultaneously introduces multiple measures such as melting and spraying of modifiers, weighing and measuring, multiple heating, and dispersing and strengthening, so as to improve the intensive method of traditional coating powder surface modification. Powder surface modification device.

Background technique

Powder surface modification is of great significance to improve the performance of powder, increase its practical value, and open up application fields. Surface modification can make low-value-added materials such as talcum powder, calcite powder, and quartz ore powder into additives, fillers, and extenders for polymer materials, and their value is doubled.

Commonly used modification methods include chemical modification, mechanochemical modification, and coating modification. Now take the coating modification as an example to analyze the traditional modification process. The results of the study found that, in terms of the application of melting spray, weighing measurement, multiple heating, and breaking up and strengthening, there is at least one lack of such measures as breaking up and strengthening in the international scope, or the lack of breaking up and strengthening, and weighing and measuring. Missing at least three or none of four measures. The traditional coating modification method often has the following problems: 1. The process is unstable, such as the same amount of modifier, the coating rate in winter and summer is very different; 2. The coating rate is low, and the amount of modifier big.

Contents of the invention

The problem to be solved by the utility model is to overcome the deficiencies of the traditional methods, provide a kind of concentrated use of various effective technical measures in the modified production line, and form a process condition with stable production conditions and measurable and controllable important parameters. An intensive powder surface modification device that controls temperature and modification time.

In order to solve the above problems, the utility model adopts the following technical solutions:

An intensive powder surface modification device, including a modification machine, the outlet of the modification machine is connected to a disintegrator through a pipeline; the feed port of the modification machine is connected to a raw material feeding device and a modified Agent feeding device.

Below is the further optimization of the above-mentioned scheme in the utility model:

Further optimization: the raw material feeding device includes a hopper, a metering bin, and a heated screw conveyor connected through pipelines in sequence, and the screw conveyor is connected with the feed port of the reformer.

Further optimization: a first weighing meter is installed at the bottom of the metering bin.

Further optimization: The modifier feeding device includes a modifier storage tank and a melter that are connected through pipelines in sequence, and the melter is orally connected with the feed port of the modifier through a liquid pump and an insulated pipeline.

Further optimization: a second weighing meter is installed at the bottom of the melter.

Further optimization: the feed inlet of the modification machine is equipped with an atomizing nozzle, and the feed inlet of the modification machine is connected with a high-pressure hot air pipe through the atomization nozzle.

Further optimization: the feed port of the reformer is also connected with an auxiliary hot air pipe.

Further optimization: the feed port of the dispersing machine is connected with the discharge port of the modification machine through a pipeline; the discharge port of the dispersing machine is connected with a cyclone collector through a conveying pipeline, and the conveying pipeline is provided with a damper.

Further optimization: the cyclone collector is connected to the bag filter through the pipeline; the bag filter is connected to the induced fan; the induced fan is equipped with an induced fan outlet pipe, and the induced fan outlet pipe is connected to the auxiliary hot air pipe.

The utility model adopts the scheme and has the following advantages:

1. Modifier melting and spraying measures are used as a method to improve the dispersibility of the modifier to distinguish the traditional incomplete defects such as direct addition of powder, or only melting injection without atomization;

2. Weighing and measuring of raw materials and modifiers means that in addition to accurate weighing and measuring of the input raw materials and modifiers during the modification process, there is also a proportional interlocking weight control to ensure a strict ratio between the two , to distinguish the traditional incomplete defects such as no precision measurement, no dynamic constant ratio addition, etc.

3. Multiple heating refers to the addition of heating, heat preservation and temperature control measures during the transmission and flow of materials, additives and air to ensure that the entire modification process is in a relatively controllable, stable and optimal state of temperature, and The best dispersion state of materials and additives to improve the coating rate and overcome the influence caused by seasonal and diurnal temperature differences, and improve quality stability.

4. Dispersion strengthening means that after the material is modified by the modification machine, it is adopted in order to solve the phenomenon of local particle micro-agglomeration and agglomeration that may occur due to unbalanced dispersion ability during the modification process, which will affect the coating effect of the product. post-modification measures. Practice shows that the modified production line after intensive improvement has achieved the goals of process stability, high coating rate and less modifier usage.

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Description of drawings

Accompanying drawing 1 is the schematic structural diagram of the intensive powder surface modification device in the embodiment of the present invention.

In the figure: 1-hopper; 2-metering bin; 3-the first weighing meter; 4-screw conveyor; 5-modifier; 6-dispersing machine; 7-atomizing nozzle; 8-modifier Storage tank; 9-melter; 10-conveying pipe; 11-liquid pump; 12-insulation pipe; 13-high pressure hot air pipe; 14-cyclone collector; 15-bag filter; 16-induced fan; 17 -Second weighing meter; 18-auxiliary hot air pipe; 19-adjustment door; 20-induced fan outlet pipe.

Detailed ways

Embodiment, as shown in Figure 1, an intensive powder surface modification device, including a modification machine 5, is characterized in that: the discharge port of the modification machine 5 is connected with a breaker 6 through a pipeline; The feeding port of the reformer 5 is connected with a raw material feeding device and a modifying agent feeding device.

The raw material feeding device includes a hopper 1 , a metering bin 2 and a heated screw conveyor 4 connected sequentially through pipelines, and the screw conveyor 4 communicates with a feed inlet of a reformer 5 .

A first weighing meter 3 is installed at the bottom of the metering bin 2 .

The modifier feeding device includes a modifier storage tank 8 and a melter 9 connected sequentially through pipelines, and the melter 9 communicates with the feed port of the modifier 5 through a liquid pump 11 and an insulated pipeline 12 .

A second weighing gauge 17 is installed at the bottom of the melter 9 .

An atomizing nozzle 7 is installed at the feeding port of the reforming machine 5 , and the feeding port of the reforming machine 5 is connected with a high-pressure hot air pipe 13 through the atomizing nozzle 7 .

The feed port of the reformer 5 is also connected with an auxiliary hot air pipe 18 .

The feed port of the breaker 6 is connected with the discharge port of the modification machine 5 through the pipeline; the discharge port of the breaker 6 is connected with a cyclone collector 14 through the delivery pipeline 10, and the delivery pipeline 10 is provided with Adjust damper 19.

The cyclone collector 14 is connected with a bag filter 15 through a pipeline; the bag filter 15 is connected with an induced draft fan 16; Tube 18 communicates.

An intensive powder surface modification production process. The raw material is D97:10u GCC, which is coated and modified with stearic acid. The coating rate is required to be ≥ 98%, and the amount of modifier ≤ 0.8% by weight.

The process includes the following steps:

1. Measuring and conveying of raw materials;

The raw material enters the metering bin 2 from the hopper 1, and is accurately measured by the first weighing meter 3, then enters the screw conveyor 4, and is heated to 60°-80° by an external heater in the screw conveyor 4, and then reaches the improved The feed inlet of sex machine 5;

2. Modifier metering delivery;

Modifier powdery stearic acid is sent into the melter 9 from the modifier storage tank 8 and heated to 80°-90°, it is in a molten state, and is accurately measured by the second weighing meter 17 according to the ratio of raw material weight The liquid pump 11 sends it to the atomizing nozzle 7 through the heat preservation pipeline 12 under the condition that the temperature of the modifier does not drop, and sprays it to the feed port of the modifier 5 after being fully atomized; in order to ensure that the atomizing nozzle is not blocked And after atomization, it is in a fully dispersed state, and a high-pressure hot air source of 100° to 110° is supplemented through a high-pressure hot air pipe 13 at the entrance of the atomizing nozzle 7 .

3. Modification;

The raw materials at 60°-80°, the atomized stearic acid dosed in a certain amount, and the auxiliary hot air at 100°-120° are adsorbed in the cavity of the modification machine 5 under highly dispersed and high-speed mixing motion to complete the coating process , at this time, the material is under high dispersion conditions of about 100°～110°, and the retention time is 0.8-1.5 seconds;

4. Break up;

After the modification, the material enters the disintegrator 6, and the agglomerated false particles are deagglomerated by using the mechanical force field generated by the rotor of the disintegrator, so that the surface of the real particles is further exposed to the atmosphere containing the modifier to further strengthen the coating, and the residence time is reduced. 0.8-1.5 seconds;

5. Collection;

Then, the material is brought into the cyclone collector 14 by the pressurized hot air introduced from the damper 19 through the conveying pipe 10 for the first step of gas and solid separation, because the body is separated from the lower part, which is the majority of the product.

The dusty gas in the cyclone collector 14 enters the bag filter 15 for further gas and solid separation, and the solid is collected as a product, and the gas is drawn out by the induced draft fan 16 for exhaust.

In order to fully utilize the heat of the exhausted air, the air outlet pipe 20 of the induced draft fan is partially communicated with the auxiliary hot air pipe 18 .

Adopting the process of the utility model can make: the metering and proportioning of materials and additives are more accurate and the dispersion and mixing degree of the two are higher; the modification temperature is more stable and reasonable; the modification time is improved by 0.8-1.5 seconds 1 times. Received a good modification effect.

Comparison table of modified effect with traditional method

The test result of this product is: adopt the method of the present utility model, the GCC of D97:10u is modified with 0.6% stearic acid in the embodiment, and the product coating rate reaches 98%～99%.

Claims (9)

1. an intensive powder surface modification device comprises modifying machine (5), it is characterized in that: the discharge port of described modifying machine (5) has beater (6) by pipeline connection; The opening for feed of modifying machine (5) is communicated with raw material feeding unit and properties-correcting agent feeding unit.

2. a kind of intensive powder surface modification device according to claim 1, it is characterized in that: the raw material feeding unit comprises successively the spiral conveyer (4) of hopper (1), measuring chute (2) and band heating by pipeline connection, and described spiral conveyer (4) is communicated with the opening for feed of modifying machine (5).

3. a kind of intensive powder surface modification device according to claim 2, it is characterized in that: the bottom of described measuring chute (2) is equipped with the first Weighing meter (3).

4. according to the arbitrary described a kind of intensive powder surface modification device of claim 1-3, it is characterized in that: the properties-correcting agent feeding unit comprises properties-correcting agent storage tank (8), the melting tank (9) that passes through pipeline connection successively, and melting tank (9) is communicated with the opening for feed of modifying machine (5) by liquid pump (11) and utilidor (12).

5. a kind of intensive powder surface modification device according to claim 4, it is characterized in that: the bottom of described melting tank (9) is equipped with the second Weighing meter (17).

6. a kind of intensive powder surface modification device according to claim 4 is characterized in that:

The opening for feed of modifying machine (5) is equipped with atomizer (7), and the opening for feed of described modifying machine (5) is communicated with hot high pressure airduct (13) by atomizer (7).

7. a kind of intensive powder surface modification device according to claim 6, it is characterized in that: the opening for feed of described modifying machine (5) also is communicated with auxiliary heat airduct (18).

8. a kind of intensive powder surface modification device according to claim 7 is characterized in that:

The opening for feed of beater (6) is connected by the discharge port of pipeline with modifying machine (5); The discharge port of beater (6) is communicated with rotoclone collector (14) by transport pipe (10), and described transport pipe (10) is provided with air register (19).

9. a kind of intensive powder surface modification device according to claim 8, it is characterized in that: rotoclone collector (14) has bag dust filter (15) by pipeline connection; Be communicated with induced draft fan (16) on the bag dust filter (15); Induced draft fan (16) is provided with induced draft fan air outlet tube (20), and induced draft fan air outlet tube (20) is communicated with auxiliary heat airduct (18).

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