CN214457723U - Amino resin serialization apparatus for producing - Google Patents
Amino resin serialization apparatus for producing Download PDFInfo
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- CN214457723U CN214457723U CN202120632372.1U CN202120632372U CN214457723U CN 214457723 U CN214457723 U CN 214457723U CN 202120632372 U CN202120632372 U CN 202120632372U CN 214457723 U CN214457723 U CN 214457723U
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Abstract
An amino resin continuous production device, comprising: the device comprises a reaction kettle, wherein the top part of the reaction kettle is respectively provided with a solid raw material feeding device, a liquid etherifying agent feeding pipeline and an acidic catalyst solution feeding pipeline, and each feeding device and each feeding pipeline are of a continuous metering feeding structure; a candle type metal filter is arranged at the bottom of the reaction kettle; the inlet of the static mixer is connected with the liquid outlet pipeline of the candle type metal filter; an alkali liquor adding pipeline which is connected with the inlet of the static mixer through an alkali liquor metering pump; the reduced pressure distillation kettle is connected with the outlet of the static mixer through a delivery pump; and the filter pressing device is connected with the reduced pressure distillation kettle. Adopt the utility model discloses an amino resin serialization apparatus for producing realizes the continuous type reaction of automatic control feeding and the ejection of compact of liquid level control, promotes production efficiency, improves product quality's stability and homogeneity by a wide margin.
Description
Technical Field
The utility model belongs to the organic synthesis field, concretely relates to amino resin serialization apparatus for producing.
Background
The amino resin is usually matched with polyester resin, acrylic resin, epoxy resin and epoxy resin as a coating cross-linking agent, is widely applied in the field of coating baking finish, has very high requirement on the index stability of a product as a coating baking finish curing agent, and has very large influence on the film forming effect of the coating baking finish due to the fluctuation of the quality of the amino resin under the condition of fixed formula of the coating baking finish.
The amino resin is used as a fine chemical product, an intermittent production process is usually adopted, one kettle is produced, and then the next kettle is produced, and the product quality is greatly influenced by conditions such as temperature, time, a catalyst, a stirring condition, a pH value and the like, and the product control condition of each kettle cannot be different in the production operation process, so that the product quality fluctuation of different batches is larger. The intermittent reaction has low production efficiency compared with the continuous flow reaction, a large amount of waiting idle time exists in the feeding and transferring processes of the reaction kettle, and the utilization rate of the reaction kettle is not high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an amino resin serialization apparatus for producing in order to solve the shortcoming that amino resin tradition production intermittent type formula technology product quality is unstable, production efficiency is low, reation kettle utilization ratio is low.
According to the utility model discloses an amino resin serialization apparatus for producing, include:
the device comprises a reaction kettle, wherein the top part of the reaction kettle is respectively provided with a solid raw material feeding device, a liquid etherifying agent feeding pipeline and an acid catalyst solution feeding pipeline, the solid raw material feeding device comprises an automatic feeding hopper with a weighing module and a feeding control valve, the liquid etherifying agent feeding pipeline is internally provided with an automatic flow control valve, and the acid catalyst solution feeding pipeline is also provided with an automatic flow control valve; a candle type metal filter is arranged at the bottom of the reaction kettle;
the inlet of the static mixer is connected with the liquid outlet pipeline of the candle type metal filter;
an alkali liquor adding pipeline which is connected with the inlet of the static mixer through an alkali liquor metering pump;
the reduced pressure distillation kettle is connected with the outlet of the static mixer through a delivery pump; and
and the filter pressing device is connected with the reduced pressure distillation kettle.
Preferably, the bottom of the reaction kettle is provided with 2-4 groups of candle type metal filters, each group of filters is connected with 1-4 candle type metal filters in parallel, each group of filters is provided with a discharge pipeline, each group of filters is provided with a nitrogen back-blowing system, and solid raw materials are switched out after blocking the pore channels of the filters and are back-blown by nitrogen to clear the filters. 2-4 groups of candle type metal filters can be mutually switched for use, and when the blocked group of filters are subjected to nitrogen back blowing and clearing, other unblocked group of filters work to ensure continuous discharging.
Preferably, an online pH meter is arranged at the outlet end of the static mixer and is connected with an alkali liquor metering pump. The flow of the alkali liquor metering pump is controlled through signal feedback, and the PH value of the feed liquor is controlled within a set value range.
Preferably, the reduced pressure distillation kettles are connected in series by 2-4 stages, and heat exchangers are connected in series between the reduced pressure distillation kettles of each stage.
The utility model discloses advantage and the beneficial effect who etherifies the amino resin preparation facilities contrast with the tradition do:
1. the production process of the amino resin continuous production device is stable continuous flow production, breaks through the bottleneck of the traditional etherified amino resin single-kettle intermittent production process, and has more stable product quality and higher production efficiency.
2. This amino resin serialization apparatus for producing has adopted continuous multistage series connection vacuum distillation production technology, can avoid single cauldron to influence to product quality because of conditions such as time, temperature, stirring rotational speed are different in the vacuum distillation in-process, and it is stable homogeneous to accomplish to produce the product, and equipment utilization is high.
3. Compared with a single-kettle production process, the amino resin continuous production device has the advantages that the equipment investment cost can be reduced by 60-70% under the condition of the same production capacity, the single-kettle utilization rate can be improved by 60%, and the situations that a reaction kettle is idle and vacant in the material transferring and feeding processes are reduced.
Drawings
FIG. 1 is a process flow diagram of the continuous amino resin production apparatus of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following examples, which are illustrative of the present invention and are not intended to limit the present invention.
Referring to fig. 1, the continuous production device for amino resin of the present invention mainly comprises a reaction kettle 1, a static mixer 8 and a three-stage vacuum distillation kettle.
The top of the reaction kettle 1 is respectively provided with a solid raw material feeding device 2, a liquid etherifying agent feeding pipeline 3 and an acid catalyst solution feeding pipeline 4. The solid raw material feeding device 2 comprises an automatic feeding hopper with a weighing module and a feeding control valve, and the liquid etherifying agent feeding pipeline 3 and the acidic catalyst solution feeding pipeline 4 are respectively fed by adopting a flow automatic control valve; the bottom of the reaction kettle 1 is provided with a candle type metal filter 5. The reaction kettle 1 is provided with a stirring device. Through the structure, the special steady-state fully-mixed flow reaction kettle for etherified amino resin can realize the continuous reaction of the liquid level control discharge of the automatic control feeding.
The inlet of the static mixer 8 is connected with the liquid outlet pipe 7 of the candle type metal filter 5; the alkali liquor feeding pipeline 9 is also connected with the inlet of the static mixer 8 through an alkali liquor metering pump. An online pH meter 10 is arranged at the outlet end of the static mixer 8, the online pH meter 10 is connected with an alkali liquor metering pump in series, the flow of the alkali liquor metering pump is controlled through signal feedback, and the pH value of the feed liquid is controlled within a set value range.
The first-stage reduced pressure distillation kettle 11 is connected with the outlet of the static mixer 8 through a delivery pump 14; the back of the first-stage reduced pressure distillation kettle 11 is sequentially connected with a second-stage reduced pressure distillation kettle 12 and a third-stage reduced pressure distillation kettle 13 in series. A delivery pump and a heat exchanger 15 are arranged on the serial pipeline, and the feed liquid is subjected to temperature compensation through the heat exchanger 15. The bottom discharge hole of the third-stage reduced pressure distillation kettle 13 is connected with a filter pressing device, and the top of the third-stage reduced pressure distillation kettle is connected with a vacuum condensation recovery system for recovering low-boiling-point substances. In the production process, about 60 percent of low-boiling-point substances are removed in the first-stage reduced pressure distillation kettle, about 35 percent of low-boiling-point substances are removed in the second-stage reduced pressure distillation kettle, and finally the low-boiling-point substances enter the third-stage reduced pressure distillation kettle to remove about 5 percent of low-boiling-point substances, and finally the solid content of the materials reaches more than 98 percent and the materials enter a filter pressing working section.
Preferably, the bottom of the reaction kettle 1 is provided with 2-4 groups of candle type metal filters 5, each group of filters is connected with 1-4 candle type metal filters 5 in parallel, each group of filters is provided with a discharge pipeline, and each group of filters is provided with a nitrogen back-blowing system 6. After the solid raw material blocks the pore channel of the filter, the solid raw material is switched out and is cleaned by nitrogen back flushing. 2-4 groups of candle type metal filters can be mutually switched for use, and when the blocked group of filters are subjected to nitrogen back blowing and clearing, other unblocked group of filters work to ensure continuous discharging.
The utility model provides a reation kettle 1, tertiary decompression stills and heat exchanger 15 all adopt steam heat transfer structure to heat up the material.
In a specific case, the solid raw material is polymethylol melamine, including hexamethylol melamine, pentamethyl melamine, tetramethylol melamine, and trimethylol melamine; the liquid etherifying agent is alkyl alcohol selected from methanol, ethanol, butanol, propanol, etc. The acid catalyst is selected from hydrochloric acid, nitric acid, formic acid, acetic acid, phthalic anhydride or p-benzene sulfonic acid and the like.
Below at 30m3Specific examples are described by way of example of a specially-made reaction kettle.
(1) Metering and feeding hexamethylol melamine and methanol at the same time according to the molar ratio of 1:20, setting the feeding flow of the methanol to be 6000kg/h, controlling the feeding rate to be 2800kg/h by using an automatic hexamethylol melamine weighing module, starting a stirrer and heating steam at the same time after feeding is started, heating the materials in the kettle, controlling the temperature in the kettle to be 45 ℃ when the liquid level in the kettle reaches 50%, replenishing 10kg of concentrated hydrochloric acid into the kettle, adjusting the pH value in the kettle to be 2-5, controlling the reaction temperature to be 48 ℃ and starting etherification reaction, and keeping the methanol and the hexahydroxy to be fed continuously and stably according to the previous set values. Then, a hydrochloric acid feeding metering pump is started, a feeding rate of 5kg/h is set, and the temperature in the kettle is regulated to be stabilized at 48 ℃ in a mode of switching on and off circulating water and heating steam.
(2) When the liquid level in the kettle reaches 85%, a group of candle filters at the bottom are opened, a material pump is started, the extraction flow is automatically controlled according to the liquid level, the feeding speed of the methanol and the hexamethylol melamine is stable and unchanged, and the liquid level in the kettle is controlled to be 85% unchanged.
(3) After the material is extracted by the candle filter, starting an alkali liquor feeding metering pump, adding 30% sodium hydroxide alkali liquor in front of the static mixer, and controlling the pH value to be 8-10 by an online pH meter to finish the etherification polycondensation reaction.
(4) After the materials are terminated, the materials are sent into a first-stage reduced pressure distillation kettle through a material pump, about 60% of low-boiling-point substances in the materials are removed, after the solid content of the materials is analyzed in a sampling mode to be qualified, the materials are transferred into a second-stage reduced pressure distillation kettle to remove about 35% of the low-boiling-point substances, the materials finally enter a third-stage reduced pressure distillation kettle to remove about 5% of the low-boiling-point substances, the solid content of the materials finally reaches more than 98%, the materials enter a filter pressing working section, and the materials are sent into a filtering intermediate kettle to be prepared for filter pressing.
(5) Adding a certain amount of diatomite into the filtering intermediate kettle, maintaining stirring, starting a material pump to filter the material through a filter press, and starting metering, barreling and discharging after the material is clear and transparent observed at a viewing window.
Claims (5)
1. An amino resin continuous production device, characterized by comprising:
the device comprises a reaction kettle, wherein the top part of the reaction kettle is respectively provided with a solid raw material feeding device, a liquid etherifying agent feeding pipeline and an acid catalyst solution feeding pipeline, the solid raw material feeding device comprises an automatic feeding hopper with a weighing module and a feeding control valve, the liquid etherifying agent feeding pipeline is internally provided with an automatic flow control valve, and the acid catalyst solution feeding pipeline is also provided with an automatic flow control valve; a candle type metal filter is arranged at the bottom of the reaction kettle;
the inlet of the static mixer is connected with the liquid outlet pipeline of the candle type metal filter;
an alkali liquor adding pipeline which is connected with the inlet of the static mixer through an alkali liquor metering pump;
the reduced pressure distillation kettle is connected with the outlet of the static mixer through a delivery pump; and
and the filter pressing device is connected with the reduced pressure distillation kettle.
2. The continuous production device of amino resin as claimed in claim 1, wherein the bottom of the reaction kettle is designed with 2-4 sets of candle-type metal filters, each set of candle-type metal filters is connected in parallel with 1-4 candle-type metal filters, each set of candle-type metal filters is provided with a discharge pipeline, and each set of candle-type metal filters is designed with a nitrogen back-blowing system.
3. The continuous production device of amino resin as claimed in claim 1, wherein the outlet end of the static mixer is provided with an on-line PH meter connected to an alkali liquor metering pump.
4. The continuous production device of amino resin as claimed in claim 1, wherein the vacuum distillation still adopts 2-4 stages in series.
5. The continuous production apparatus of amino resin according to claim 4, wherein a heat exchanger is connected in series between each stage of vacuum distillation still.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120632372.1U CN214457723U (en) | 2021-03-29 | 2021-03-29 | Amino resin serialization apparatus for producing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120632372.1U CN214457723U (en) | 2021-03-29 | 2021-03-29 | Amino resin serialization apparatus for producing |
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| CN214457723U true CN214457723U (en) | 2021-10-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113061222A (en) * | 2021-03-29 | 2021-07-02 | 重庆建峰浩康化工有限公司 | Novel process for producing etherified amino resin by steady-state full-mixed flow kettle type reaction |
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2021
- 2021-03-29 CN CN202120632372.1U patent/CN214457723U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113061222A (en) * | 2021-03-29 | 2021-07-02 | 重庆建峰浩康化工有限公司 | Novel process for producing etherified amino resin by steady-state full-mixed flow kettle type reaction |
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