CN217016544U - Stepped inflation reaction device - Google Patents

Abstract

The technical scheme discloses a ladder-falling sectional type inflatable reaction device. The ladder falling sectional type inflation reaction device comprises a gas buffer kettle, a first separation collector, a first reaction kettle, a second separation collector, a second reaction kettle, a third separation collector, a third reaction kettle and a catalyst preparation kettle; the gas buffer kettle is provided with a feed inlet matched with an external hydrogen source. The technical problem solved by the technical scheme is as follows: how to improve the overall reaction efficiency of the raw materials and the catalyst.

Description

Stepped inflation reaction device

Technical Field

The utility model relates to a method for switching large-capacity one-time reaction into multi-step small-scale reaction, thereby fully utilizing the relation between the solubility of raw materials and the activity of a catalyst to improve the comprehensive reaction performance of a device.

Background

After the raw materials and the catalyst are put into the reaction kettle, the concentration of the raw materials and the activity of the catalyst are in a curve descending mode, the early-stage reaction speed is high, the later-stage reaction is slow, and meanwhile, the volume of the reaction kettle is relatively large, so that the device and the mode need to be improved.

In order to solve the above problems, through search, chinese patent publication No. 20180216 discloses a multi-functional multi-phase staged reaction apparatus and a multi-phase staged reaction method, the apparatus comprising a gas-liquid injection pipe, a liquid outflow pipe, a liquid inlet pipe and at least two reaction vessels; the top of each reaction kettle is communicated with each other and is communicated with the gas-liquid injection pipe and the liquid inlet pipe, the bottom of each reaction kettle is communicated with the liquid outlet pipe, and the liquid outlet pipe is detachably communicated with the liquid inlet pipe. The multiphase segmented reaction method comprises the steps of putting reaction raw materials into reaction kettles, enabling reaction products in the reaction kettles to circulate among the reaction kettles through a gas-liquid injection pipe, a liquid outflow pipe and a liquid inflow pipe, achieving reaction, and discharging the products after the reaction is finished. Although the device adopts a staged reaction, the device cannot adjust the concentration of reactants and the activity of a catalyst, so that the applicability is limited.

Similarly, chinese patent publication No. 20201013 discloses a staged production device for EVA treatment agent, comprising a front-stage reaction kettle and a rear-stage reaction kettle, which are connected to each other through a connecting pipeline; the front-section reaction kettle and the rear-section reaction kettle are both provided with kettle bodies and kettle covers, the front-section reaction kettle is provided with a front-section feed port and a front-section discharge port, and the rear-section reaction kettle is provided with a first feed port, a second feed port and a rear-section discharge port; the front-stage reaction kettle and the rear-stage reaction kettle are both provided with stirring devices for stirring materials; baffles are uniformly arranged on the inner wall of the front section reaction kettle in the axial direction around the stirring shaft. The utility model has a front reaction kettle and a rear reaction kettle, is convenient for the sectional production of the EVA treating agent, does not need the single kettle to transfer materials for production, and has simple and convenient operation and high production efficiency. Although the device adopts a segmented mode, the actual innovation point of the device is the innovation in the kettle and does not relate to the relationship between reactants and a catalyst.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a stair falling sectional type inflation reaction device, which solves the technical problems that: how to improve the overall reaction efficiency of the raw materials and the catalyst.

The falling ladder sectional type inflation reaction device comprises a gas buffer kettle, a first separation collector, a first reaction kettle, a second separation collector, a second reaction kettle, a third separation collector and a third reaction kettle; the gas buffer kettle is provided with a feed inlet, and a discharge port of the gas buffer kettle is respectively matched with feed inlets of the first separation collector, the first reaction kettle, the second separation collector, the second reaction kettle, the third separation collector and the third reaction kettle; the first separation collector is provided with feed inlets, one feed inlet is communicated with the inner cavity of the first reaction kettle in a drop height mode through a pipeline, and the drop height mode means that the height of the position where the pipeline is connected with the first reaction kettle is higher than the height of the pipeline and the first separation collector, so that a reaction mixture of the first reaction kettle enters the first separation collector according to the height drop; the first separation collector is respectively matched with the second separation collector, the third separation collector and a feed inlet of a third reaction kettle through pipelines; a discharge hole of the first reaction kettle is matched with a feed hole of the second reaction kettle; one feed inlet of the second separation collector is communicated with the inner cavity of the second reaction kettle in a drop height mode through a pipeline, and one discharge outlet of the second separation collector is communicated with the first reaction kettle; the second separation collector is communicated with the third separation collector through a pipeline; one discharge port of the third separation collector is communicated with the second reaction kettle, and one feed port of the third separation collector is communicated with the inner cavity of the third reaction kettle in a drop height manner through a pipeline; the third separation collector is communicated with the inner cavity of the third reaction kettle through a pipeline; a discharge hole of the second reaction kettle is matched with a feed inlet of the third reaction kettle; the first separation collector is internally provided with an inner cavity and a hollow filter pipe, and the filter pipe and the outer arm and the bottom of the separation collector are provided with gaps; the filter pipe of the first separation collector is matched with one feed inlet of the second separation collector, the filter pipe of the second separation collector is matched with one feed inlet of the third separation collector, and the filter pipe of the third separation collector is matched with one feed inlet of the third reaction kettle.

The raw material liquid comprises a raw material tank and a solvent tank.

The first separation collector is provided with a discharge hole matched with an inactivation catalyst tank.

The falling ladder sectional type gas-filled reaction device further comprises a catalyst preparation kettle, and a feed inlet of the third reaction kettle is matched with the catalyst preparation kettle.

The third reaction kettle is provided with a discharge hole which is matched with the product tank.

The inside (mixing) shaft that has of catalyst preparation cauldron, this catalyst preparation cauldron and catalyst storage tank cooperation.

And one feed inlet of the first reaction kettle is matched with external raw material liquid.

The first separation collector, the second separation collector and the third separation collector are identical in structure.

The utility model has the beneficial effects that: the utility model utilizes the linkage of the separation collector and the reaction kettle to form a primary reaction system, and the raw material liquid is sequentially introduced into the first reaction kettle, the second reaction kettle and the third reaction kettle to be matched with hydrogen and a catalyst to form reaction mixed liquid; the feeding direction of the catalyst and the feeding mode of the raw material liquid are designed relatively. The scheme designs a three-stage reaction system, so that the original mode of 'big pot' is optimized into a mode of 'small frying' + 'fine management of raw material concentration and catalyst activity', the whole reaction efficiency is obviously improved, and the whole volume of a reaction kettle is reduced, so that the cost of the whole system is obviously reduced, and the reaction safety is ensured. Through tests, the system has better overall performance.

Drawings

FIG. 1 is a schematic diagram of a system;

FIG. 2 is a schematic view of one of the separation collectors;

in the figure, 1, a gas buffer kettle, 2, a first separation collector, 21, a filter pipe, 22, a cavity, 3, a first reaction kettle, 4, a second separation collector, 5, a second reaction kettle, 6, a third separation collector, 7, a third reaction kettle, 8, a catalyst preparation kettle, 91, a gas source, 92, an inactivation catalyst tank, 93, a catalyst water solution tank, 94, a raw material tank, 95, a solvent tank and 96, a product tank are arranged.

Detailed Description

Referring to fig. 1 and 2, the ladder-falling sectional type aeration reaction apparatus in the figures includes a gas buffer kettle 1, a first separation collector 2, a first reaction kettle 3, a second separation collector 4, a second reaction kettle 5, a third separation collector 6, a third reaction kettle 7, and a catalyst preparation kettle 8. The gas buffer vessel 1 is used for buffering the pressure of the gas source 91, thereby facilitating the reaction with the raw material liquid in the reaction vessel. The first separation collector 2 is used for collecting the catalyst solid in the reaction mixed liquid led out from the first reaction vessel 3 so as to be conveniently led into the deactivated catalyst tank 92, and simultaneously, the liquid part in the reaction mixed liquid is led into the next separation collector under the action of air pressure to wash the catalyst in the separation collector or is led into the third reaction vessel 7 to participate in the reaction. The first reaction vessel 3 is used for the reaction of the reaction mixture. The second separation collector 4 is used for collecting the reaction mixture led out from the second reaction kettle 5; under the action of air pressure, the liquid of the reaction mixture is pressed into the second reaction kettle 5, and the residual solid, namely the catalyst, is attached to a filter pipe 21 in the separation collector; the solid catalyst is introduced into the first reaction vessel 3 under the flushing of the liquid portion of the reaction mixture introduced into the first separation collector 2. The second reaction vessel 5 is used for the reaction of the reaction mixture. The third separation collector 6 is used for collecting the reaction mixture led out from the third reaction kettle 7; under the action of air pressure, the liquid of the reaction mixture is pressed into the third reaction kettle 7, and the residual solid, namely the catalyst, is attached to the filter pipe 21 of the third separation collector 6; the solid catalyst is introduced into the second reaction vessel 5 under the flushing of the liquid portion of the reaction mixture introduced into the second separation collector 4. The third reaction vessel 7 is used for reacting the reaction mixture and receiving the catalyst aqueous solution in the catalyst preparation vessel 8. Catalyst preparation cauldron 8 is used for storing the catalyst, and its inside has rabbling mechanism, avoids the catalyst to precipitate. In practical application, other components can be added, so that the overall performance of the system can be better improved. The components except the separation collector are common components or equipment commonly adopted in the chemical industry, for example, a heat preservation mechanism or device is arranged on a jacket on each reaction kettle, and valves, control, measurement and other components are arranged among the components according to the existing mode.

The high-pressure hydrogen gas source 91 is arranged outside the gas buffer kettle 1, the scheme is only suitable for hydrogen as a reducing agent, the gas buffer kettle 1 is provided with a feeding port and a discharging port, the feeding port is provided with the external gas source 91, and the discharging port is correspondingly and respectively communicated with the separation collector, the first reaction kettle 3, the second separation collector 4, the second reaction kettle 5, the third separation collector 6 and the third reaction kettle 7, so that the liquid part in the reaction mixture is extruded by introducing gas into the components and participates in reaction, and the specific communication mode can refer to the existing modes such as flanges.

The main innovative design of the first separation collector 2 is that the structure of the first separation collector 2 is provided with a plurality of cavities 22 formed by hollow pipelines, wherein one cavity 22 is used as a feeding hole and is used for leading the reaction mixture in the first reaction kettle 3 into the first separation collector 2 by using fall so that the reaction mixture is arranged in the first separation collector 2; then one of the chambers 22 is used for communicating hydrogen, so that when hydrogen is introduced, the hydrogen can lead out the liquid part in the reaction mixture in the separation collector to the second separation collector 4, the solid part in the reaction mixture, i.e. the catalyst, is attached to the filter pipe 21 in the separation collector, and when the catalyst naturally falls, the inactivated catalyst can be led into the inactivated catalyst tank 92. The diameter of the filtration pores in the filtration tube 21 is required to be smaller than the particle diameter of the catalyst particles.

The first reaction vessel 3 is provided with a feed inlet, so that the introduction of gas and reaction raw materials is facilitated, and the catalyst and the reaction mixture led out from the second separation collector 4 are received. This first reation kettle 3 also has the discharge gate, and the high concentration feed solution in the reaction mixed liquid after will reacting according to the operating mode condition like this is leading-in to second reation kettle 5 in or derive to first separation collector 2 in. The concentration of the raw material liquid in the first reaction kettle 3 is high, and the concentration of the catalyst is low.

The structure of the second separation collector 4 is the same as that of the first separation collector 2, the interior of the second separation collector is provided with a plurality of cavities 22 formed by hollow pipelines, one cavity 22 is used as a feed inlet, and the reaction mixture in the second reaction kettle 5 is introduced into the second separation collector 4 by using fall, so that the reaction mixture is arranged in the second separation collector 4; then one of the cavities 22 is used for communicating hydrogen, so that when the hydrogen is introduced, the hydrogen can lead out the liquid part in the reaction mixture in the separation collector to the third collector, the solid part in the reaction mixture, namely the catalyst, is attached to the filter pipe 21 in the separation collector, and then the liquid led out by the first separation collector 2 can flush the catalyst on the filter pipe 21, so that the catalyst is led into the first reaction kettle 3 from the discharge hole at the bottom of the catalyst to participate in the reaction.

The second reaction vessel 5 has the same structure as the first reaction vessel 3 and has a feed port for introducing a gas and a reaction mixture discharged from the first reaction vessel 3, so that a raw material liquid of the high concentration reaction mixture from the first reaction vessel 3 becomes a medium concentration and receives a catalyst and a reaction mixture discharged from the third separation collector 6. The second reaction vessel 5 also has a discharge port, so that the medium-concentration raw material solution after reaction is introduced into the third reaction vessel 7 or the medium-concentration catalyst is led out into the second separation collector 4 according to the working conditions. The concentration of the raw material liquid in the second reaction kettle 5 is medium, and the concentration of the catalyst is medium.

The structure of the third separation collector 6 is the same as that of the first separation collector 2, a plurality of cavity 22 structures formed by hollow pipelines are arranged in the third separation collector, one cavity 22 is used as a feeding hole, and the reaction mixture in the third reaction kettle 7 is guided into the third separation collector 6 by using fall, so that the reaction mixture is arranged in the third separation collector 6; then one of the cavities 22 is used for communicating hydrogen, so when the hydrogen is introduced, the hydrogen can lead out the liquid part in the reaction mixture in the separation collector to the third reaction kettle 7, the solid part in the reaction mixture, namely the catalyst, is attached to the filter pipe 21 in the separation collector, and then when the liquid led out by the second separation collector 4 can flush the catalyst on the filter pipe 21, so that the catalyst is led into the second reaction kettle 5 from the discharge port at the bottom of the catalyst for participating in the reaction.

The third reaction vessel 7 has the same structure as the first reaction vessel 3 and has a feed inlet for introducing a gas, a reaction mixture discharged from the second reaction vessel 5, and a catalyst, so that a raw material liquid of a medium-concentration reaction mixture from the second reaction vessel 5 becomes a low-concentration reaction mixture, and receives a catalyst aqueous solution discharged from the second catalyst preparation vessel 8. The third reaction vessel 7 also has a discharge port, so that a low-concentration raw material liquid and a high-concentration catalyst are introduced into the second separation collector 4 according to the conditions, or the produced product is conveyed to the product tank 96. The concentration of the raw material liquid in the third reaction kettle 7 is low, and the concentration of the catalyst is high.

The catalyst preparation kettle 8 is communicated with an external catalyst aqueous solution tank 93, and a stirring shaft is arranged in the catalyst preparation kettle 8, so that the catalyst in the preparation kettle is prevented from precipitating.

To facilitate the introduction of the raw material solution, a raw material tank 94 and a solvent tank 95 are provided according to a conventional design, thereby forming a raw material aqueous solution. The raw materials of the scheme can adopt aromatic substances.

The falling ladder sectional type inflation reaction method mainly comprises the following steps: hydrogen serves both as a reactant and as a liquid substance is transported by high pressure using its unique gaseous form. The hydrogen conveying mode of the scheme is as follows: hydrogen is passed into the first separation collector 2 and the liquid fraction of the reaction mixture in the first separation collector 2 is pressed into the second separation collector 4. Hydrogen is passed into the second separation collector 4, so that the liquid fraction of the reaction mixture in the second separation collector 4 is pressed into the third separation collector 6 and the catalyst solids subsequently enter the first reaction vessel 3. Introducing hydrogen into the first reaction kettle 3 to react with the reaction mixed liquid in the kettle. Introducing hydrogen into a third separation collector 6, pressing a liquid part in a reaction mixture in the third separation collector 6 into a third reaction kettle 7, and allowing a catalyst solid to enter a second reaction kettle 5; introducing hydrogen into the second reaction kettle 5 to react with the reaction mixed liquid in the kettle; and introducing hydrogen into the third reaction kettle 7 to react with the reaction mixed liquid in the kettle.

The catalyst conveying mode of the scheme is as follows: the catalyst aqueous solution in the catalyst preparation kettle 8 is sequentially led into a third reaction kettle 7, a third separation collector 6, a second reaction kettle 5, a second separation collector 4, a first reaction kettle 3 and a first separation collector 2; the catalyst aqueous solution is in the drop height from the third reaction kettle 7 to the third separation collector 6, from the second reaction kettle 5 to the second separation collector 4, and from the first reaction kettle 3 to the first separation collector 2, wherein the drop height means that the height of the position where the pipeline is connected with the reaction kettle is higher than the height of the pipeline and the separation collector, so that the reaction mixture of the reaction kettle enters the separation collector according to the height drop.

The conveying mode of the raw material liquid is as follows: introducing the raw material liquid into a first reaction kettle 3, a second reaction kettle 5 and a third reaction kettle 7 in sequence to be matched with hydrogen and a catalyst to form a reaction mixed liquid; the material conveying mode of the raw material liquid and the material conveying direction of the catalyst are designed relatively.

In the first reaction kettle 3, the concentration of the raw material liquid is highest, and the activity of the catalyst is lowest, in the second reaction kettle 5, the concentration of the raw material liquid is medium, and the activity of the catalyst is medium, and in the third reaction kettle 7, the concentration of the raw material is lowest, and the activity of the catalyst is highest.

In the first separation collector 2, the liquid portion of the reaction mixture introduced into the first separation collector 2 is introduced into the first reaction vessel 3 and the solid portion, i.e., the catalyst, is collected, in the second separation collector 4, the liquid portion of the reaction mixture introduced into the second separation collector 4 is introduced into the second reaction vessel 5 and the solid portion, i.e., the catalyst, is introduced into the first reaction vessel 3, and in the third separation collector 6, the liquid portion of the reaction mixture introduced into the third separation collector 6 is introduced into the third reaction vessel 7 and the solid portion, i.e., the catalyst, is introduced into the second reaction vessel 5.

In the above embodiment, a first-stage device is formed by one separation collector corresponding to one reaction kettle, which has three stages in total, and in practical application, the number of stages can be increased.

The above-described embodiments are merely illustrative of the present invention and are not intended to limit the present invention. In the description of the present technical solution, it should be noted that the terms such as "upper", "inner", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for convenience of describing the technical solution and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the technical solution.

Meanwhile, in the description of the present technical solution, it should be noted that, unless explicitly stated or limited otherwise, the terms "fixed" and "coupled" should be interpreted broadly, and for example, they may be fixedly connected, detachably connected, or integrally connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present technical solution can be understood by those of ordinary skill in the art according to specific situations.

Claims (7)

1. Reaction unit is aerifyd to terraced sectional type that falls, its characterized in that: comprises a gas buffer kettle (1), a first separation collector (2), a first reaction kettle (3), a second separation collector (4), a second reaction kettle (5), a third separation collector (6) and a third reaction kettle (7); the gas buffer kettle (1) is provided with a feed inlet, and a discharge outlet of the gas buffer kettle (1) is respectively matched with feed inlets of the first separation collector (2), the first reaction kettle (3), the second separation collector (4), the second reaction kettle (5), the third separation collector (6) and the third reaction kettle (7); the first separation collector (2) is provided with feed inlets, one of the feed inlets is communicated with the inner cavity of the first reaction kettle (3) through a pipeline in a drop height mode, the drop height refers to the height of the position where the pipeline is connected with the first reaction kettle (3) is higher than the height of the pipeline and the first separation collector (2), so that the reaction mixture of the first reaction kettle (3) enters the first separation collector (2) according to the height drop; the first separation collector (2) is respectively matched with the feed inlets of the second separation collector (4), the third separation collector (6) and the third reaction kettle (7) through pipelines; a discharge hole of the first reaction kettle (3) is matched with a feed hole of the second reaction kettle (5); one feed inlet of the second separation collector (4) is communicated with the inner cavity of the second reaction kettle (5) in a drop height mode through a pipeline, and one discharge outlet of the second separation collector (4) is communicated with the first reaction kettle (3); the second separation collector (4) is communicated with the third separation collector (6) through a pipeline; a discharge port of the third separation collector (6) is communicated with the second reaction kettle (5), and a feed port of the third separation collector (6) is communicated with the inner cavity of the third reaction kettle (7) in a drop height manner through a pipeline; the third separation collector (6) is communicated with the inner cavity of the third reaction kettle (7) through a pipeline; a discharge hole of the second reaction kettle (5) is matched with a feed hole of the third reaction kettle (7); an inner cavity and a hollow-out filter pipe (21) are arranged in the first separation collector (2), and gaps are formed between the filter pipe (21) and the outer arm and the bottom of the separation collector; the filter pipe (21) of the first separation collector (2) is matched with one feed inlet of the second separation collector (4), the filter pipe (21) of the second separation collector (4) is matched with one feed inlet of the third separation collector (6), and the filter pipe (21) of the third separation collector (6) is matched with one feed inlet of the third reaction kettle (7).

2. The landing stage segmented gas-filled reaction device according to claim 1, wherein: the first separation collector (2) has a discharge opening cooperating with a deactivated catalyst tank (92).

3. The landing stage staged inflation reaction device of claim 2, wherein: the ladder-falling sectional type gas-filled reaction device further comprises a catalyst preparation kettle (8), and a feed inlet of the third reaction kettle (7) is matched with the catalyst preparation kettle (8).

4. A landing stage staged inflation reaction device as claimed in claim 3, wherein: the third reaction kettle (7) is provided with a discharge hole which is matched with the product tank (96).

5. The landing stage staged inflation reaction device of claim 4, wherein: the catalyst preparation kettle (8) is internally provided with a stirring shaft, and the catalyst preparation kettle (8) is matched with a catalyst storage tank.

6. The landing stage staged inflation reaction device of claim 5, wherein: one feed inlet of the first reaction kettle (3) is matched with external raw material liquid.

7. The landing stage staged inflation reaction device of claim 6, wherein: the first separating collector (2), the second separating collector (4) and the third separating collector (6) have the same structure.

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