CN204933460U - Molecular sieve synthesis system - Google Patents

Abstract

The utility model discloses a molecular sieve synthesis system, include: the top of the synthesis reaction kettle is provided with a first feeding port, a first vent and a pressure gauge, the bottom of the synthesis reaction kettle is provided with a discharge port, and the synthesis reaction kettle is provided with a heating device; a cooling reaction kettle, the top of which is provided with a feed inlet communicated with the discharge outlet, a second feed inlet and a second vent, the bottom of which is provided with a discharge outlet, and a cooling device is arranged in the cooling reaction kettle; and the upper end opening of the pressure equalizing pipeline is communicated with the first vent through a three-way pipe, the rest opening of the three-way pipe is a vent, the lower end opening of the pressure equalizing pipeline is communicated with the second vent, and the pressure equalizing pipeline is provided with a pressure regulating port. The utility model discloses can eliminate the influence of synthetic reation kettle internal cooling coil pipe to the mass transfer, raise the efficiency.

Description

Molecular sieve synthesis system

technical field

The utility model relates to a molecular sieve synthesis system, in particular to a reaction kettle and a reaction system for hydrothermally synthesizing molecular sieves.

Background technique

The traditional production method of zeolite molecular sieve is hydrothermal synthesis method, and the reaction kettle is mainly a vertical stirring reaction kettle. The existing reactor is a vertical jacketed reactor with a cooling coil and a stirring paddle at the axis. During the synthesis process, the heat conduction oil in the jacket is heated, and the synthesis system is mixed evenly by the stirring paddle. After the synthesis is completed, the product is cooled by the cooling coil. The existence of the cooling coil leads to two kinds of mass transfer resistance, which makes the synthesis efficiency low: (1) the volume and shape of the agitator are limited, making it impossible to provide effective stirring effect; volumetric space. The low synthesis efficiency shows that the stirring effect is poor and miscellaneous crystals are easily formed, and the product is not pure or even the target product cannot be obtained.

Chinese patent CN201579048U proposes to transfer the cooling coil to the reactor jacket, which greatly reduces the maintenance workload of the coil and improves work efficiency, but due to the low cooling efficiency of the jacket, a large amount of cooling water and longer cooling time are required time. Chinese patent CN101205071A discloses a horizontal reactor, which overcomes the shortcoming of the poor mixing effect of the vertical reactor. Because the reactants in the reactor cannot be completely filled, part of the stirring paddle is immersed in the liquid phase and the other part is exposed to the gas phase, resulting in uneven force. The paddle and motor are easily damaged. Chinese patent CN201088913Y proposes a rotating reactor system, which improves the mixing effect and can synthesize a variety of molecular sieves under the same reaction conditions, shortening the test time, but driving the reactor to rotate will greatly increase energy consumption.

Therefore, how to design a molecular sieve synthesis reaction system so that it can solve the defects in the prior art has become an urgent problem to be solved by those skilled in the art.

Utility model content

The purpose of the utility model is to propose a molecular sieve synthesis system, which can eliminate the influence of the cooling coil in the synthesis reactor on mass transfer and improve the efficiency.

In order to achieve the above object, the utility model proposes a molecular sieve synthesis system, comprising:

A synthesis reaction kettle, the top of the synthesis reaction kettle is provided with a first feeding port, a first air vent and a pressure gauge, the bottom of the synthesis reaction kettle is provided with a discharge port, and the synthesis reaction kettle is provided with a heating device;

A cooling reaction kettle, the top of the cooling reaction kettle is provided with a feed port communicated with the discharge port, a second feeding port and a second ventilation port, the bottom of the cooling reaction kettle is provided with a discharge port, and the There is a cooling device in the cooling reactor;

A pressure-equalizing pipeline, the upper opening of the pressure-equalizing pipeline communicates with the first air vent through a three-way pipe, and the remaining opening of the three-way pipe is a vent opening, and the lower end opening of the pressure-equalizing pipeline is connected to the The second ventilation port is connected, and a pressure regulating port is opened on the pressure equalizing pipeline.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present utility model, the outlet of the synthesis reactor is connected with the feed inlet of the cooling reactor, and the outlet of the synthesis reactor is connected to the feed inlet of the cooling reactor. A cut-off valve is arranged at the connection of the feed port of the cooling reactor.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present utility model, the pressure equalization pipeline makes the first air vent, the vent, the pressure regulating port of the synthesis reaction kettle and the first ventilation port of the cooling reaction kettle The two vents communicate with each other, the venting port is provided with a cut-off valve, and the upper opening of the pressure equalizing pipeline is provided with a shut-off valve (that is, the connection between the upper opening of the pressure equalizing pipeline and the tee pipe). A shut-off valve is arranged on the pressure port, and a shut-off valve is arranged on the second vent of the cooling reactor.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present invention, the synthesis reactor is a pressure-resistant reactor, which can maintain and withstand the high pressure in the reactor, and its pressure-resistant range is 0.1-4.0 MPa. Preferably, the synthesis reactor is a pressure-resistant reactor specially used for crystallization synthesis.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present invention, the synthesis reactor is a vertical jacketed reactor or a horizontal reactor.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present utility model, the synthesis reactor is a vertical jacketed reactor, comprising a loam cake and a kettle body, and the loam cake and the kettle body are fixed together; The first feeding port, the first ventilation port and the pressure gauge are respectively arranged on the upper cover and communicate with the inside of the vertical jacketed reactor; the outlet is arranged at the bottom of the kettle body and connected to the The vertical jacketed reactor is internally connected.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present invention, the upper cover and the kettle body are fixed together by fastening screws, and the internal pressure of the reactor is maintained by means of upper and lower sealing.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present invention, a safety valve is also provided at the top of the synthesis reaction kettle.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present invention, a stirring paddle is arranged in the synthesis reaction kettle. The stirring paddle can be arranged at the center of the reactor. Wherein the stirring paddle can be a commercially available stirring device or other stirring systems disclosed in the prior art, such as the stirring system disclosed in Chinese patent CN201220338083.1. Since no cooling coil is installed in the synthetic reaction kettle of the utility model, the stirring paddle in the synthetic reactor of the present utility model will not be hindered by the cooling coil during operation, therefore, the stirring paddle can be selected to have a larger size, and the stirring is more uniform The type, which makes the stirring more fully and the reaction more fully.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present utility model, the heating device is a jacketed heating device, which includes a jacket set outside the synthesis reaction kettle, and the lower part of the jacket is provided with a heat-conducting medium Inlet, the upper part of the jacket is provided with a heat transfer medium outlet. Wherein, the heating medium in the jacket is heat-conducting oil (or other feasible heating medium), and the heat-conducting medium is input into the jacket from the heat-conducting medium inlet to heat the synthesis reaction vessel, and then discharged from the heat-conducting medium outlet.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present invention, a shut-off valve is provided on the first feeding port.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present invention, the pressure gauge can be used to monitor the pressure in the synthesis reactor, and can also be used to assist in monitoring the temperature of the reactants in the synthesis reactor.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present invention, the cooling reactor is a pressure-resistant reactor, which is used for cooling or premixing raw materials, and its pressure-resistant range is 0.1-4.0 MPa.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present invention, the cooling reactor is a vertical reactor.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present utility model, the cooling reaction kettle includes a loam cake and a kettle body, and the loam cake and the kettle body are fixed together; The port and the second air vent are respectively arranged on the upper cover and communicate with the inside of the vertical reactor; the discharge port is arranged at the bottom of the kettle body and communicate with the inside of the vertical reactor.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present invention, the upper cover and the kettle body are fixed together by fastening screws.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present utility model, a safety valve is provided at the top of the cooling reactor.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present invention, a stirring paddle is arranged in the cooling reactor. The stirring paddle can be arranged at the center of the reactor. Wherein the stirring paddle can be a commercially available stirring device or other stirring systems disclosed in the prior art, such as the stirring system disclosed in Chinese patent CN201220338083.1.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present utility model, the cooling device is a coil type cooling device, comprising a cooling coil arranged inside the cooling reactor, and the cooling coil is coiled around the cooling Inside the reaction kettle, the cooling coil inlet and the cooling coil outlet at both ends respectively pass through the kettle wall of the cooling reaction kettle. The coiling mode of the cooling coil inside the cooling reactor can be S-shaped, coiled, etc., as long as it can fill the inner space of the cooling reactor as much as possible. When the device is running, the cooling medium enters the cooling coil from the inlet of the cooling coil, runs coiled inside the cooling reactor to cool the contents of the reactor, and finally discharges from the outlet of the cooling coil.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present invention, the second feeding port and the discharging port are respectively provided with a stop valve.

The molecular sieve synthesis system provided by an embodiment of the present invention, its specific use method comprises the following steps:

1) adding the raw materials into the material preparation container to prepare the suspension;

2) Close the cut-off valve on the upper opening of the pressure equalizing pipeline, the cut-off valve of the vent, the cut-off valve of the discharge port of the synthesis reactor and the cut-off valve of the discharge port of the cooling reactor, and open the cut-off valve of the pressure regulating port , the shut-off valve of the second venting port of the cooling reactor, the shut-off valve of the second feeding port, pump air at the pressure regulating port to form a negative pressure in the cooling reactor, and then pass the raw material through the hose of the second feeding port of the cooling reactor The suspension in the container is sucked into the kettle, and the pumping operation is stopped after completion;

3) Set the stirring speed and time in the cooling reactor, start the stirring, carry out the premixing of the raw materials, and stop the stirring operation after the premixing is completed;

4) Connect the discharge port of the cooling reactor with the first feeding port of the synthesis reactor with a hose, close the cut-off valve at the upper end of the equalizing pipeline, the cut-off valve of the discharge port of the synthesis reactor, the second feed inlet Open the shut-off valve of the vent, the shut-off valve of the pressure regulating port, the shut-off valve of the second venting port of the cooling reactor, the shut-off valve of the first feeding port of the synthesis reactor and the cooling reaction The cut-off valve at the discharge port of the kettle, pump air into the pressure-regulating port of the pressure equalization pipeline, use the pressure to hydraulically inject the mixed material into the synthesis reaction kettle, and close all the stop valves after completion; the above steps 1-4 are to cool The reactor completes the pre-mixing preparation of raw materials;

5) Turn on the heating device and stirring paddle of the synthesis reactor, set the stirring rate and temperature, then turn on the temperature rise switch, and start the stirring paddle according to the set stirring rate, so that the materials in the synthesis reactor will be heated at the set temperature Stir evenly to make it react more uniformly and comprehensively. During the reaction process, keep the inside of the kettle sealed and use the self-generated pressure in the kettle to maintain the reaction;

6) As the temperature rises, the temperature of the material can be observed through the temperature measuring point in the kettle, and the pressure value of the pressure gauge (the saturated water vapor temperature corresponding to the pressure value can display the temperature of the material) can be used to monitor whether the temperature is at the set value value;

7) After the synthesis is finished, stop the stirring and heating in the synthesis reactor, and pass a cooling medium (such as cooling water) into the cooling coil in the cooling reactor, and the above steps 5-7 are to complete the raw materials with the synthesis reactor Synthetic work to generate molecular sieve slurry;

8) Open the cut-off valve of the upper opening of the equalizing pipeline and the stop valve of the second vent of the cooling reactor, while keeping the other shut-off valves closed, and carry out the equalizing operation to make the air pressure in the two reactors equal;

9) After the pressure equalization operation is completed, open the shut-off valve of the discharge port of the synthesis reactor, the molecular sieve slurry is transferred to the cooling reactor under the action of gravity, set the stirring rate in the cooling reactor, and start stirring;

10) The temperature of the slurry is detected by the thermocouple in the cooling reactor. After reaching the predetermined cooling target, the cooling is completed, the stirring and the circulation of the cooling medium are stopped, and the shut-off valve of the pressure regulating port and the shut-off valve of the discharge port of the cooling reactor are opened. Unload the collected and cooled molecular sieve slurry; the above step 8-10 is to complete the cooling of the synthetic product by cooling the reactor.

The molecular sieve synthesis system provided by an embodiment of the utility model, in terms of technical principles, changes the traditional heating and cooling in the same reactor to two reactors—the synthesis reactor is mainly used for synthesis Part or all of the materials can be discharged into the cooling reactor during or after the end of the reaction and synthesis, thereby eliminating the influence of the cooling coil on mass transfer.

Specifically, compared with the prior art, the utility model has the following advantages:

1) The mixing effect of the reaction slurry is good: there is no cooling coil in the synthesis reaction kettle, only the stirring paddle, which eliminates the dead volume, and various stirring systems with good stirring effect can be used to improve the mass transfer effect. Can be fully mixed, the final product quality is stable;

2) High synthesis efficiency: Since there is no cooling coil in the synthesis reaction kettle, the effective volume increases, and after eliminating the interference of the coil, the success rate of synthesis is improved and the generation of waste is reduced;

3) The reaction process is controllable: the outlet of the synthesis reactor is connected to the cooling reactor. Therefore, during the reaction process, it is convenient to collect samples, control the reaction process, and monitor product quality;

4) High cooling efficiency and overall efficiency: the cooling reaction kettle is mainly used for cooling the reaction product and premixed raw materials. There are stirring paddles and cooling coils inside the kettle, which improves the cooling efficiency. Since the premixed raw materials can also be carried out in the cooling reaction kettle , so this overall integrated device improves the efficiency of the entire synthesis process;

5) Wide range of applications: the series reactor synthesis system of the utility model can be applied in many fields such as chemical industry.

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the utility model.

Description of drawings

Fig. 1 is a schematic structural diagram of a molecular sieve synthesis system provided by an embodiment of the present invention.

Among them, reference signs:

1 synthesis reactor

11 The first feeding port

111 globe valve

12 outlet

121 globe valve

13 heating device

131 heat transfer medium inlet

132 jacket

133 heat conduction medium outlet

14 stirring paddle

15 first vent

16 pressure gauge

17 safety valve

2 cooling reactor

21 feed port

22 discharge port

221 globe valve

23 cooling device

231 cooling coil inlet

232 cooling coil

233 cooling coil outlet

24 paddle

25 second vent

251 globe valve

27 safety valve

29 The second feeding port

291 globe valve

5 equalizing pipeline

51 pressure regulating port

511 globe valve

52 Vent

521 globe valve

531 globe valve

detailed description

In order to clearly explain the technical characteristics of the present utility model, so that those skilled in the art can clearly understand the structure, characteristics, use methods and technical effects of the present utility model, the following describes the utility model through specific implementation methods and in conjunction with the accompanying drawings. The plan is explained. However, the following descriptions are for illustrative purposes only, and are not intended to limit the present invention.

Please refer to Figure 1, in order to eliminate the influence caused by the cooling coil in the reactor, improve efficiency, and stabilize product quality, the utility model provides a molecular sieve synthesis system, including:

A synthesis reaction kettle 1, the top of the synthesis reaction kettle 1 is provided with a first feeding port 11, a first vent 15 and a pressure gauge 16, the bottom of the synthesis reaction kettle 1 is provided with a discharge port 12, and the synthesis reaction Kettle 1 is provided with a heating device 13;

A cooling reaction kettle 2, the top of the cooling reaction kettle 2 is provided with a feed inlet 21, a second feeding port 29 and a second ventilation port 25 connected with the discharge port 12, and the bottom of the cooling reaction kettle 2 is provided with a Discharge port 22, and a cooling device 23 is provided in the cooling reactor 2;

A pressure-equalizing pipeline 5, the upper opening of the pressure-equalizing pipeline 5 communicates with the first vent 15 through a three-way pipe, and the remaining opening of the three-way pipe is a vent 52, the pressure-equalizing pipeline The lower end opening of 5 communicates with the second air vent 25 , and a pressure regulating port 51 is opened on the pressure equalizing pipeline 5 .

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present utility model, the discharge port 12 of the synthesis reaction kettle 1 is connected with the feed inlet 21 of the cooling reaction kettle 2, and at the synthesis reaction kettle 1 A cut-off valve 121 is provided at the connection between the discharge port 12 and the feed port 21 of the cooling reactor 2 .

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present utility model, the equalizing pipeline 5 makes the first vent 15, the vent 52, the pressure regulating port 51 and the cooling of the synthesis reactor 1 The second vents 25 of the reaction kettle 2 are connected to each other, the vent 52 is provided with a cut-off valve 521, and the upper opening of the equalizing pipeline 5 is provided with a shut-off valve 531 (that is, the upper end of the equalizing pipeline 5 Opening and the connection of the tee pipe), the pressure regulating port 51 is provided with a cut-off valve 511, and the second vent 25 of the cooling reactor 2 is provided with a cut-off valve 251.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present invention, the synthesis reactor 1 is a pressure-resistant reactor, which can maintain and withstand the high pressure in the reactor. Preferably, the synthesis reactor 1 is a pressure-resistant reactor specially used for crystallization synthesis.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present invention, the synthesis reactor 1 is a vertical jacketed reactor or a horizontal reactor.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present utility model, the synthesis reactor 1 is a vertical jacketed reactor, comprising a loam cake and a kettle body, and the loam cake and the kettle body are fixed together ; The first feeding port 11, the first air vent 15 and the pressure gauge 16 are respectively arranged on the upper cover, and communicate with the inside of the vertical jacketed reactor; the outlet 12 is arranged on the still body Bottom, and communicated with the inside of the vertical jacketed reactor.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present invention, the upper cover and the kettle body are fixed together by fastening screws, and the internal pressure of the reactor is maintained by means of upper and lower sealing.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present invention, a safety valve 17 is provided at the top of the synthesis reaction kettle 1 .

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present invention, a stirring paddle 14 is arranged in the synthesis reaction kettle 1 . The stirring paddle 14 can be arranged at the center of the reactor. The stirring paddle 14 can be a commercially available stirring device or other stirring systems disclosed in the prior art, such as the stirring system disclosed in Chinese patent CN201220338083.1. Since no cooling coil is arranged in the synthetic reactor 1 of the present utility model, the stirring paddle 14 in the synthetic reactor 1 of the present utility model will not be hindered by the cooling coil during operation, therefore, the stirring paddle 14 can be selected to have a larger size , the type that stirs more evenly, thus making the stirring more complete and the reaction more complete.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present utility model, the heating device 13 is a jacketed heating device, including a jacket 132 arranged outside the synthesis reaction kettle, and the lower part of the jacket is provided with A heat transfer medium inlet 131, and a heat transfer medium outlet 133 is provided on the upper part of the jacket. Wherein, the heating medium contained in the jacket is heat-conducting oil (or other feasible heating medium), and the heat-conducting medium is input into the jacket from the heat-conducting medium inlet 131 to heat the synthesis reactor, and then discharged from the heat-conducting medium outlet 133.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present invention, the first feeding port 11 is provided with a stop valve 111 .

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present invention, the pressure gauge 16 can be used to monitor the pressure in the synthesis reactor 1 , and can also be used to assist in monitoring the temperature of the reactants in the synthesis reactor 1 .

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present invention, the cooling reactor 2 is a pressure-resistant reactor, which is used for cooling or premixing raw materials.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present invention, the cooling reactor 2 is a vertical reactor.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present utility model, the cooling reaction kettle 2 includes a loam cake and a kettle body, and the loam cake and the kettle body are fixed together; The second feeding port 29 and the second air vent 25 are respectively arranged on the upper cover and communicated with the inside of the vertical reactor; the discharge port 22 is arranged at the bottom of the kettle body and communicated with the inside of the vertical reactor .

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present invention, the upper cover and the kettle body are fixed together by fastening screws.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present invention, a safety valve 27 is provided at the top of the cooling reactor 2 .

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present invention, the cooling reactor 2 is provided with a stirring paddle 24 . The stirring paddle 24 can be arranged at the center of the reactor. The stirring paddle 24 can be a commercially available stirring device or other stirring systems disclosed in the prior art, such as the stirring system disclosed in Chinese patent CN201220338083.1.

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present utility model, the cooling device 23 is a coil type cooling device, comprising a cooling coil 232 arranged inside the cooling reactor 2, the cooling coil 232 Coiled inside the cooling reactor 2 , the cooling coil inlet 231 and the cooling coil outlet 233 at both ends pass through the wall of the cooling reactor 2 respectively. The coiling mode of the cooling coil 232 inside the cooling reactor 2 can be S-shaped, coiled, etc., as long as it can fill the inner space of the cooling reactor 2 as much as possible. When the device is in operation, the cooling medium enters the cooling coil 232 from the cooling coil inlet 231 , runs coiled inside the cooling reactor 2 to cool the contents of the reactor, and is finally discharged from the cooling coil outlet 233 .

Wherein, in a preferred embodiment of the molecular sieve synthesis system of the present invention, the second feeding port 29 and the discharging port 22 are respectively provided with a stop valve 291 and 221 .

The molecular sieve synthesis system provided by an embodiment of the present invention, its specific use method comprises the following steps:

1) adding the raw materials into the material preparation container to prepare the suspension;

2) Close the cut-off valve 531 of the upper opening of the equalizing pipeline 5, the cut-off valve 521 of the vent 52, the cut-off valve 121 of the discharge port 12 of the synthesis reactor 1 and the cut-off valve of the discharge port 22 of the cooling reactor 2 221, open the shut-off valve 511 of the pressure regulating port 51, the shut-off valve 251 of the second air port 25 of the cooling reactor 2, the shut-off valve 291 of the second feeding port 29, and the cooling reactor is pumped at the pressure regulating port 51 2. Form a negative pressure, and then suck the suspension in the material preparation container into the kettle through the flexible pipe of the second feeding port 29 of the cooling reactor 2, and stop the pumping operation after completion;

3) Set the stirring speed and time in the cooling reactor 2, start the stirring, carry out the premixing of the raw materials, and stop the stirring operation after the premixing is completed;

4) Use a hose to connect the discharge port 22 of the cooling reactor 2 with the first feeding port 11 of the synthesis reactor 1, close the cut-off valve 531 at the upper end of the equalizing pipeline 5, and the outlet 12 of the synthesis reactor 1. The shut-off valve 121 of this second feeding port 29, the shut-off valve 291 of this second feeding port 29, the shut-off valve 521 of this emptying port 52, the shut-off valve 511 of this pressure regulating port 51, the shut-off valve 251 of this cooling reaction kettle 2 second air vent 25 , the shut-off valve 111 of the first feeding port 11 of the synthesis reactor 1 and the shut-off valve 221 of the discharge port 22 of the cooling reactor 2 pump air into the pressure regulating port 51 of the equalizing pipeline 5, and utilize the pressure The mixed material is hydraulically injected into the synthesis reactor 1, and all shut-off valves are closed after completion; the above steps 1)-step 4) are to complete the premixing preparation of the raw materials with the cooling reactor 2;

5) Open the heating device 13 and the stirring paddle 14 of the synthetic reactor 1, set the stirring rate and temperature, then open the temperature rise switch, and start the stirring paddle 14 by the set stirring rate, so that the material in the synthetic reactor 1 is Stir evenly at the set temperature to make it react more uniformly and comprehensively. During the reaction process, keep the inside of the kettle sealed and use the self-generated pressure in the kettle to maintain the reaction;

6) As the temperature rises, the temperature of the material can be observed through the temperature measuring point in the kettle, and the pressure value of the pressure gauge 16 can also be observed (the saturated water vapor temperature corresponding to the pressure value can display the temperature of the material) to monitor whether the temperature is within the set value. Value;

7) After the completion of the synthesis, stop the stirring and heating in the synthesis reactor 1, and pass into the cooling medium (such as cooling water) in the cooling coil 232 in the cooling reactor 2, the above steps 5)-step 7) that is Complete the synthesis of raw materials with the synthesis reactor 1 to generate molecular sieve slurry;

8) Open the cut-off valve 531 of the opening on the upper end of the equalizing line 5 and the cut-off valve 251 of the second vent 25 of the cooling reactor 2, while keeping the other shut-off valves closed, and carry out the equalizing operation to make the air pressure in the two reactors equal;

9) After the pressure equalization operation is completed, open the shut-off valve 121 of the outlet 12 of the synthesis reactor 1, the molecular sieve slurry is transferred to the cooling reactor 2 under the action of gravity, set the stirring rate in the cooling reactor 2, and start stirring;

10) The temperature of the slurry is detected by the thermocouple in the cooling reactor 2. After reaching the predetermined cooling target, the cooling is completed, the stirring and the circulation of the cooling medium are stopped, and the shut-off valve 511 of the pressure regulating port 51 and the discharge port of the cooling reactor 2 are opened. The shut-off valve 221 of 22 discharges the collected and cooled molecular sieve slurry; the above step 8)-step 10) is to complete the cooling of the synthetic product by cooling the reactor 2.

The molecular sieve synthesis system provided by an embodiment of the utility model, in terms of technical principles, changes the traditional heating and cooling in the same reactor to two reactors—the synthesis reactor is mainly used for synthesis Part or all of the materials can be discharged into the cooling reactor during or after the end of the reaction and synthesis, thereby eliminating the influence of the cooling coil on mass transfer.

Specifically, compared with the prior art, the utility model has the following advantages:

1) The mixing effect of the reaction slurry is good: there is no cooling coil in the synthesis reaction kettle, only the stirring paddle, which eliminates the dead volume, and various stirring systems with good stirring effect can be used to improve the mass transfer effect. Can be fully mixed, the final product quality is stable;

2) High synthesis efficiency: Since there is no cooling coil in the synthesis reaction kettle, the effective volume increases, and after eliminating the interference of the coil, the success rate of synthesis is improved and the generation of waste is reduced;

3) The reaction process is controllable: the outlet of the synthesis reactor is connected to the cooling reactor. Therefore, during the reaction process, it is convenient to collect samples, control the reaction process, and monitor product quality;

4) High cooling efficiency and overall efficiency: the cooling reaction kettle is mainly used for cooling the reaction product and premixed raw materials. There are stirring paddles and cooling coils inside the kettle, which improves the cooling efficiency. Since the premixed raw materials can also be carried out in the cooling reaction kettle , so this overall integrated device improves the efficiency of the entire synthesis process;

5) Wide range of applications: the series reactor synthesis system of the utility model can be applied in many fields such as chemical industry.

Certainly, the utility model also can have other various embodiments, under the situation of not departing from the spirit and essence of the utility model, those skilled in the art can make various corresponding changes and distortions according to the utility model, but these Corresponding changes and deformations should all belong to the protection scope of the claims of the present invention.

Claims (17)

1. A molecular sieve synthesis system, characterized in that, comprising: A synthesis reaction kettle, the top of the synthesis reaction kettle is provided with a first feeding port, a first air vent and a pressure gauge, the bottom of the synthesis reaction kettle is provided with a discharge port, and the synthesis reaction kettle is provided with a heating device; A cooling reaction kettle, the top of the cooling reaction kettle is provided with a feed port communicated with the discharge port, a second feeding port and a second ventilation port, the bottom of the cooling reaction kettle is provided with a discharge port, and the A cooling device is provided in the cooling reactor; and A pressure-equalizing pipeline, the upper opening of the pressure-equalizing pipeline communicates with the first air vent through a three-way pipe, and the remaining opening of the three-way pipe is a vent opening, and the lower end opening of the pressure-equalizing pipeline is connected to the The second ventilation port is connected, and a pressure regulating port is opened on the pressure equalizing pipeline. 2. a kind of molecular sieve synthetic system according to claim 1, is characterized in that, this synthesis reactor is a pressure-resistant reactor. 3. A molecular sieve synthesis system according to claim 1, characterized in that the synthesis reactor is a vertical jacketed reactor or a horizontal reactor. 4. a kind of molecular sieve synthesis system according to claim 1, is characterized in that, this synthetic reactor is a vertical jacketed reactor, comprises a loam cake and a still body, and this loam cake and this still body are fixed on Together; the first feeding port, the first air vent and the pressure gauge are respectively arranged on the upper cover, and communicate with the inside of the vertical jacketed reactor; the outlet is arranged at the bottom of the kettle body, and It communicates with the inside of the vertical jacketed reactor. 5. A molecular sieve synthesis system according to claim 1 or 4, characterized in that, the top of the synthesis reactor is also provided with a safety valve. 6. A molecular sieve synthesis system according to claim 1 or 4, characterized in that a stirring paddle is arranged in the synthesis reactor. 7. A kind of molecular sieve synthetic system according to claim 1 or 4, is characterized in that, this heating device is a jacket type heating device, comprises a jacket that is arranged outside this synthetic reactor, and this jacket lower part There is a heat transfer medium inlet, and the upper part of the jacket is provided with a heat transfer medium outlet. 8. A molecular sieve synthesis system according to claim 1, characterized in that the cooling reactor is a pressure-resistant reactor. 9. A molecular sieve synthesis system according to claim 1, characterized in that the cooling reactor is a vertical reactor. 10. A kind of molecular sieve synthetic system according to claim 9, is characterized in that, this cooling reactor comprises a loam cake and a kettle body, and this loam cake and this kettle body are fixed together; The second feeding port and the second ventilation port are respectively arranged on the upper cover and communicated with the interior of the vertical reaction kettle; the discharge port is arranged at the bottom of the kettle body and communicated with the interior of the vertical reaction kettle. 11. A molecular sieve synthesis system according to claim 1 or 10, characterized in that a safety valve is also provided at the top of the cooling reactor. 12. A molecular sieve synthesis system according to claim 1 or 10, characterized in that a stirring paddle is arranged in the cooling reactor. 13. A kind of molecular sieve synthetic system according to claim 1 or 10, it is characterized in that, this cooling device is a coil type cooling device, comprises a cooling coil that is arranged on this cooling reactor inside, and this cooling coil The coil is coiled inside the cooling reactor, and the cooling coil inlet and the cooling coil outlet at both ends pass through the wall of the cooling reactor respectively. 14. A molecular sieve synthesis system according to claim 1, characterized in that, the first feeding port is provided with a stop valve. 15. A molecular sieve synthesis system according to claim 1, characterized in that a cut-off valve is arranged at the connection between the discharge port of the synthesis reactor and the feed port of the cooling reactor. 16. A kind of molecular sieve synthesis system according to claim 1, characterized in that, a cut-off valve is arranged on the vent port, a cut-off valve is arranged on the upper opening of the pressure equalizing pipeline, a cut-off valve is arranged on the pressure regulating port, A cut-off valve is arranged on the second air port of the cooling reactor. 17. A molecular sieve synthesis system according to claim 1, characterized in that, the second feeding port and the discharging port are respectively provided with a stop valve.