CN211886768U - Multi-temperature-zone temperature control device and reaction system - Google Patents

Abstract

The utility model provides a multi-temperature-zone temperature regulating device and reaction system, including at least two confession liquid return circuits, multiunit valve and connecting tube, the temperature that each confession liquid return circuit can provide is different, connecting tube is used for connecting treats temperature control equipment, and each connecting tube communicates to each confession liquid return circuit through the changeable formula of a set of valve respectively. By simple switching action, the temperature control of the partition/sectional type of the multi-temperature area can be ensured, the pipeline of the liquid supply loop does not need to be frequently operated, and the operation safety is effectively ensured.

Description

Multi-temperature-zone temperature control device and reaction system

Technical Field

The utility model belongs to the technical field of the accuse temperature of microreactor, concretely relates to multi-temperature-zone temperature regulating device and reaction system.

Background

The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.

In many scenarios, different temperatures of a plurality of devices to be controlled need to be controlled, for example, the microchannel technology has been accepted by more and more academy of sciences and factories as a new technology, new process development is also widely applied to the microchannel technology, and when the microchannel reactor is used for process development, the temperature is often required to be changed and switched to different temperatures so as to grope process parameters or perform partition and segment control.

Especially for multi-stage reactions, multi-stage temperature control is required. The prior temperature control mode needs to be frequently connected with different refrigerant pipelines, so that the operation is complex, the efficiency is low, and in the disassembly and connection processes, the refrigerant/heat medium still has certain risks and is splashed, and the safety is low.

Disclosure of Invention

The utility model discloses a solve above-mentioned or potential problem, provided a multi-temperature-zone temperature regulating device and reaction system, the utility model discloses can provide the refrigerant of different temperatures according to the difference of the required different temperatures of reaction piece/reactor, realize segmentation/multistage control, guarantee the security and the reaction efficiency of reactor.

According to some embodiments, the utility model adopts the following technical scheme:

firstly, a multi-temperature-zone temperature control device is provided, which comprises at least two liquid supply loops, a plurality of groups of valves and connecting pipelines, wherein the temperature provided by each liquid supply loop is different, the connecting pipelines are used for connecting equipment to be controlled in temperature, and each connecting pipeline is communicated to each liquid supply loop in a switchable manner through at least one group of valves.

Above-mentioned design can be according to the difference of treating the required temperature of temperature-controlled equipment, through nimble change valve state, just can make corresponding connecting tube communicate to supply liquid return circuit with required temperature assorted to for treating temperature-controlled equipment provides suitable temperature.

As an alternative embodiment, the refrigerant temperature in the liquid supply circuit is different.

As an alternative embodiment, the heat source/heat sink to which the liquid supply circuit is connected may be at different temperatures.

Of course, in other embodiments, the temperature that the liquid supply circuit can provide may also be made different by other means. The above objects are achieved by simple modifications.

In an alternative embodiment, the valve is a multi-way ball valve.

In an alternative embodiment, the valve is a multi-position solenoid valve.

Of course, in other embodiments, other devices, such as a switch, may be used for the valve, as long as any switchable one-to-one communication between the designated end/position and the other end/position can be ensured.

As an alternative embodiment, the liquid supply circuits each comprise a liquid inlet pipe and a liquid outlet pipe.

As an alternative embodiment, the liquid inlet pipelines of different liquid supply circuits are separately arranged. The liquid inlet pipelines are separately arranged, so that the temperature of the refrigerants in the liquid inlet pipelines can be guaranteed not to be influenced mutually.

As an alternative embodiment, the liquid outlet pipelines of different liquid supply circuits are distributed separately or are integrated into one distribution.

As an alternative embodiment, each set of valves comprises two valves, which are respectively arranged at the liquid inlet pipeline and the liquid outlet pipeline.

Of course, in other embodiments, each set of valves may include only one valve, and may be disposed at the inlet conduit.

Alternatively, each set of valves comprises a plurality of valves, arranged at specific positions of the liquid supply circuit, as the case may be.

As an alternative, each of said liquid supply circuits/connection ducts is provided with a temperature sensor.

Secondly, a reaction system is provided, which comprises the multi-temperature-zone temperature control device and a plurality of reactors, wherein each reactor is respectively connected with a connecting pipeline.

Of course, the liquid supply loops can be two groups or a plurality of groups, the arrangement is flexible according to the number of the temperature zones, and the number of the reactors in each temperature zone can also be flexibly set.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses utilize valve, connecting tube and the setting that supplies the liquid return circuit, through simple switching action, just can guarantee the accuse temperature of the subregion/sectional type of multi-temperature-zone, do not need frequent pipeline itself to supplying the liquid return circuit to operate, the effectual security of guaranteeing the operation.

Meanwhile, each temperature-controlled device can be ensured to have at least two temperature environments, so that the operation is convenient, and the efficiency can be improved.

The utility model discloses a supply liquid return circuit inlet pipeline separately to lay, the return circuit pipeline can separately lay, also can gather and arrange, can effectively, high-efficiently utilize finite space according to indoor, the nimble design of internal environment of factory.

The utility model discloses the range of application is extensive, at the application occasion of reactor, through only needing the switching valve, can change the temperature of each reactor, also changes the time of dwell simultaneously, and change process conditions that can be quick is experimental.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.

FIGS. 1a to 1b are structural views of a conventional reactor;

FIG. 2 is a schematic structural diagram according to the first embodiment;

FIG. 3 is a schematic structural view of the second embodiment;

FIG. 4 is a schematic structural diagram of the third embodiment.

Wherein: 1. a reaction plate; 2. a partition plate; 3. a heat exchange plate; 4. sealing the cover plate; 5. a reaction channel; 6. a heat exchange channel; 7. a heat exchange interface; 8. a three-way ball valve; 9. a reaction block; 10. a coolant supply pipe; 11. a refrigerant outlet pipe;

a. a heat exchange inlet pipe i; b. a heat exchange inlet pipe ii; c. a heat exchange outlet pipe i; d. and a heat exchange pipe ii.

The specific implementation mode is as follows:

the present invention will be further explained with reference to the accompanying drawings and examples.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

In the present invention, the terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, and are only the terms determined for convenience of describing the structural relationship of each component or element of the present invention, and are not specific to any component or element of the present invention, and are not to be construed as limiting the present invention.

In the present invention, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and may be fixedly connected, or may be integrally connected or detachably connected; may be directly connected or indirectly connected through an intermediate. The meaning of the above terms in the present invention can be determined according to specific situations by persons skilled in the art, and should not be construed as limiting the present invention.

As described in the background, in many scenarios, it is desirable to control different temperatures for multiple devices to be controlled, as illustrated in the example section by reaction block 9 (also referred to as a reactor).

However, the device or system provided in the embodiments is not limited to the technical field of chemical reaction or micro reaction, and for other technical fields, the provided product can be obviously directly used or simply modified and then used, and the protection scope of the present invention should belong to the claims.

The chemical reaction is usually accompanied by a strong heat exchange, and in order to enhance heat transfer, precisely control temperature, and increase heat transfer efficiency, as shown in fig. 1a and 1b, the reaction block 9 is usually composed of a heat exchange plate 3 and a reaction plate 1, and a partition plate 2 disposed therebetween. The middle of the reaction plate 1 is provided with a plurality of reaction channels 5, the heat exchange plate 3 is provided with a plurality of heat exchange channels 6, the heat exchange channels 6 are positioned at one side or two sides of the reaction channels 5, the general reaction plate 1 is provided with a material inlet, and the heat exchange plate 3 is provided with an interface 7 for a heat exchange medium to enter and exit.

The first embodiment is as follows:

as shown in fig. 2, the segmented temperature control device includes a plurality of refrigerant circuits (only two refrigerant circuits are shown in the figure), a temperature switching valve set and a temperature control circuit. The refrigerant loop is used for connecting each connecting pipeline in the temperature control loop, and each connecting pipeline is connected with one reaction block 9 to provide a heat exchange medium for the reaction block, so that the refrigerant distribution of each reaction block 9 is realized.

In this embodiment, every refrigerant return circuit all includes refrigerant feed pipe 10 and refrigerant drain pipe 11, lets in the refrigerant of different temperatures in the refrigerant feed pipe 10, and many refrigerant feed pipe 10 way are separately arranged, and many refrigerant drain pipes 11 also separately arrange, and the convenient classification and the one-to-one correspondence of discerning the pipeline of operating personnel can be guaranteed to this kind of setting up mode.

Of course, in some embodiments, in order to distinguish/identify the function and function of each pipeline more conveniently and more conveniently, so as to facilitate maintenance or control, an identifier, such as a two-dimensional code or the like, may be provided on the pipeline, information of the pipeline exists, and a symbol, a mark or a color may be provided on the pipeline to distinguish the pipeline obviously.

The temperature switching valve group is used for selecting refrigerants with different temperatures for the reaction blocks 9. The typical temperature switching valve set is a three-way ball valve 8, and other forms such as a multi-position solenoid valve and the like can also be used.

The temperature switching valve set shown in fig. 2 is a plurality of sets of three-way ball valves 8, and each three-way ball valve 8 is respectively connected with a pipeline (a liquid supply pipe or a liquid return pipe) of each refrigerant loop and a connecting pipeline connected with different reaction blocks 9.

Of course, in other embodiments, if the number of refrigerant circuits is increased, such as three refrigerant circuits, a four-way ball valve or a multi-position solenoid valve may be used. It is only necessary to ensure that the switchable gear of the switching valve is at least one gear more than the number of the refrigerant circuits.

At this time, if the connection is made in the connection manner of the present embodiment, it is necessary to satisfy that the total number of the three-way ball valves 8 is twice as many as the number of the reaction blocks 9.

In this embodiment, each refrigerant supply pipe 10 is connected to a different heat exchange medium/refrigerant supply source. In other embodiments, other methods may be used to provide the heat exchange medium/coolant to the liquid supply tube.

The material of the liquid supply pipe, the liquid return pipe and the connecting pipe is not limited herein. The flexible choice can be made on a case-by-case basis, for example steel pipes coated with a corrosion-resistant layer, in a form that is safer and stronger. Or the material such as plastics is used, so that the overall weight and the cost investment of the pipeline are reduced. Of course, the specific material, size, etc. can be flexibly selected according to the refrigerant medium and the application environment.

By adopting the structure, the refrigerants with different temperatures introduced into different reaction blocks 9 can be selected by controlling the state of the temperature switching valve according to different temperatures required by the reaction blocks 9, so that the sectional temperature control of the reaction blocks 9 is realized.

For example, the first 5 reaction blocks 9(T1-T5) are a first temperature zone, the last 5 reaction blocks 9(T6-T10) are a second temperature zone, and each reaction block 9 is connected with two refrigerant liquid supply pipes 10 (respectively connected with a heat exchange medium i and a heat exchange medium ii with different temperatures) through a three-way ball valve 8 and connected with a refrigerant liquid outlet pipe 11 (called as a heat exchange outlet pipe i and a heat exchange outlet pipe ii for convenience of distinguishing) through another three-way ball valve 8. When the reaction is carried out, the three-way ball valve 8 of each reaction block 9 in the first temperature zone is communicated with a liquid supply pipe (referred to as a heat exchange inlet pipe i for short) connected with a heat exchange medium i, and is closed with a liquid supply pipe (referred to as a heat exchange inlet pipe ii for short) connected with a heat exchange medium ii; the other three-way ball valve 8 of each reaction block 9 in the first temperature zone is communicated with the heat exchange outlet pipe i and is closed with the heat exchange outlet pipe ii; one three-way ball valve 8 of each reaction block 9 in the second temperature zone is communicated with the heat exchange inlet pipe ii and is closed with the heat exchange inlet pipe i; the other three-way ball valve 8 of each reaction block 9 in the second temperature zone is communicated with the heat exchange outlet pipe ii and is closed with the heat exchange outlet pipe i.

Of course, in different embodiments, flexible temperature zone division and communication with the liquid inlet and outlet pipes through the switching three-way ball valve 8 can be performed according to actual reaction requirements.

The three-way ball valve 8 is communicated with the liquid inlet and outlet pipe and can be controlled by a temperature control device or a controller.

Of course, manual control is also possible.

For example, in some embodiments, the reaction blocks 9 of each temperature zone may not be adjacent or may not be equal in value. Of course, adjacent scheme management and control are more convenient, also are easier to look over, also can reduce temperature interference to a certain extent simultaneously.

In this embodiment, each of the refrigerant pipe inlet and outlet ends and each of the reaction blocks 9 are provided with a temperature sensor for detecting temperature. To achieve more accurate temperature control.

Of course, in other embodiments, the number and mounting locations of the temperature sensors may vary. For example, a temperature sensor is provided only on each connection channel. These modifications are all conceivable alternatives.

Of course, the temperature sensor can be replaced by other temperature measuring equipment or temperature components.

Of course, in some embodiments, a control module and other elements may be added, and the control module may communicate with the temperature sensor and the automatically controllable temperature switching valve set to realize the automatic switching control.

Example two

In this embodiment, as shown in fig. 3, the difference from the first embodiment is that the heat exchange plates on both sides of each reaction block 9 are connected with three-way ball valves 8. In this way, the temperature control process is more refined.

EXAMPLE III

In this embodiment, as shown in fig. 4, the difference from the first embodiment is that the heat exchange outlet pipe i and the heat exchange outlet pipe ii are combined and one pipeline is used. The design can save pipeline materials and occupied land, and is suitable for scenes with limited space.

Through specific experiments, the selective nitration reaction is taken as an example. The specific reaction formula is as follows:

in order to reduce dinitro products, the temperature must be reduced and quenched in time after the first step of nitration to prevent the reaction from continuing. The first stage of nitration reaction and the second stage of quenching neutralization are carried out, and the temperature of each reaction step needs to be well controlled and the reaction is quenched in time in order to ensure the conversion rate and reduce byproducts. In the process of process development, when a common microchannel reactor is used, two reactors are needed to control different temperatures, so that the flow rate needs to be modified or the number of the reactors needs to be changed to change the reaction residence time, or the refrigerant connecting pipeline of the reaction block 9 needs to be changed, and a low-temperature refrigerant is selected for quenching in time. Assuming that the process development requires a step of 5 reactions to determine the maximum residence time, it takes 2-4 hours to change the piping after each reaction. The process has the advantages of large workload and long time in the development process.

After the new multi-temperature-zone temperature control device is used, quenching is carried out on the reaction block 9 only by switching valves, so that the temperature of each reaction block 9 can be changed, the retention time is changed, and the process conditions can be changed rapidly for testing. After the new device is used, no time is wasted, and the construction period of process development can be greatly shortened.

It can be seen that the temperature control device has the characteristics of simple structure, quick operation, high efficiency, safety and reliability. The application of a single micro-channel reactor is expanded, one micro-reactor can be used for carrying out reactions at least two temperatures, and the operation of a tester is facilitated. The efficiency can be improved and the development period of the product can be shortened in the development process of the new process.

Of course, as mentioned above, the temperature control device can completely replace the connected reaction block 9 with other types of devices to be controlled in temperature to realize heat exchange or temperature control, and will not be described and proven herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.

Claims (10)

1. A multi-temperature-zone temperature control device is characterized in that: the temperature control device comprises at least two liquid supply loops, a plurality of groups of valves and connecting pipelines, wherein the temperature which can be provided by each liquid supply loop is different, the connecting pipelines are used for connecting equipment to be controlled in temperature, and each connecting pipeline is communicated to each liquid supply loop in a switchable manner through at least one group of valves.

2. The multi-temperature-zone temperature control device according to claim 1, characterized in that: the temperature of the refrigerants in the liquid supply loop is different;

or the temperatures of the heat source/cold source connected with the liquid supply loop are different.

3. The multi-temperature-zone temperature control device according to claim 1, characterized in that: the valve is a multi-way ball valve;

or, the valve is a multi-position electromagnetic valve.

4. The multi-temperature-zone temperature control device according to claim 1, characterized in that: the liquid supply loops comprise liquid inlet pipelines and liquid outlet pipelines.

5. The multi-temperature-zone temperature control device according to claim 4, wherein: liquid inlet pipelines of different liquid supply loops are distributed separately.

6. The multi-temperature-zone temperature control device according to claim 4, wherein: the liquid outlet pipelines of different liquid supply circuits are distributed separately or are gathered into one distribution.

7. The multi-temperature-zone temperature control device according to claim 4, wherein: each group of valves comprises two valves which are respectively arranged at the liquid inlet pipeline and the liquid outlet pipeline.

8. The multi-temperature-zone temperature control device according to claim 4, wherein: each set of valves may comprise only one valve, disposed at each inlet conduit.

9. The multi-temperature-zone temperature control device according to claim 1, characterized in that: and temperature sensors are arranged on the liquid supply loops/connecting pipelines.

10. A reaction system, characterized by: comprising a multi-temperature zone temperature control device according to any one of claims 1 to 9 and a plurality of reactors, each reactor being connected to a respective connecting line.

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