Micro-reaction heat exchanger and control method thereof

Abstract

The invention relates to the technical field of chemical equipment, particularly provides a micro-reaction heat exchanger and a control method thereof, and aims at solving the problem that an existing heat exchanger is poor in heat exchange effect. In order to achieve the purpose, the micro-reaction heat exchanger comprises an upper connecting device, a heat exchange device and a lower connecting device which are sequentially connected from top to bottom, the heat exchange device comprises a shell and a heat exchange assembly arranged in the shell, the heat exchange assembly comprises a plurality of heat exchange blocks stacked mutually, and the placement directions of the adjacent heat exchange blocks are opposite. First channels are arranged on the first end faces of the heat exchange blocks, second channels are arranged on the second end faces of the heat exchange blocks, third channels are arranged between the shell and the heat exchange assembly, the first channels are not communicated with the second channels, and the multiple first channels are communicated with one another to form a first material channel of a continuous bending structure. The multiple second channels and the third channels communicate with one another to form a second material channel of a continuous bending structure. The whole device is small in size and high in heat transfer efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of chemical equipment, and specifically provides a micro-reaction heat exchanger and a control method thereof. Background Art

[0002] Heat exchangers are devices that transfer part of the heat of hot fluid to cold fluid. They play an important role in chemical, petroleum, power, food and many other industrial productions.

[0003] The existing heat exchangers have the following defects:

[0004] 1. The structure of the heat exchanger is that the hot material flows directly from the top through the material hole to the outlet and is discharged. This results in the hot material staying in the equipment for a short time and the heat exchange effect is poor.

[0005] 2. The heat exchanger is equipped with baffles to baffle the cold material. Since there is a large gap between the baffle and the wall of the heat exchanger, the cold material cannot be baffled inside the heat exchanger and is directly discharged from the outlet along the wall of the heat exchanger, causing a short circuit. At the same time, due to the short circuit phenomenon, impurities in the water will block the gap for a long time, causing a sharp decline in the heat exchange effect.

[0006] Therefore, this field needs a new technical solution to solve the above problems. Summary of the invention

[0007] The present invention aims to solve the above technical problem, that is, to solve the problem of poor heat exchange effect of the existing heat exchanger.

[0008] In a first aspect, the present invention provides a micro-reaction heat exchanger, the micro-reaction heat exchanger comprising an upper connecting device, a heat exchange device, and a lower connecting device connected in sequence from top to bottom; the heat exchange device comprises a shell and a heat exchange component arranged in the shell, the heat exchange component comprises a plurality of heat exchange blocks stacked on each other, the placement directions of adjacent heat exchange blocks are opposite, a first end face of the heat exchange block is provided with a first channel, a second end face of the heat exchange block is provided with a second channel, a third channel is provided between the shell and the heat exchange component, the first channel and the second channel are not connected to each other, and a plurality of the first channels are connected to each other. The first material channel has a continuous bending structure and is interconnected with each other, and the second channels and the third channels are interconnected to form a second material channel with a continuous bending structure; the upper connecting device is provided with a first material feed port, and the lower connecting device is provided with a first material discharge port, and the first material feed port and the first material discharge port are respectively connected to the first material channel; the upper end of the shell is provided with a second material discharge port, and the lower end of the shell is provided with a second material feed port, and the second material feed port and the second material discharge port are respectively connected to the second material channel.

[0009] In a specific embodiment of the above-mentioned micro-reaction heat exchanger, the first channel includes a first trough body, a plurality of second trough bodies and a plurality of third trough bodies which are interconnected, the first trough body is arranged at the center of the first end surface of the heat exchange block, the plurality of second trough bodies are arranged transversely along the circumferential direction of the first trough body, and the plurality of third trough bodies are arranged longitudinally through the heat exchange block.

[0010] In a specific embodiment of the above-mentioned micro-reaction heat exchanger, the second channel includes a fourth trough body and a plurality of fifth trough bodies which are interconnected, the fourth trough body is arranged at the center of the second end surface of the heat exchange block, and the plurality of fifth trough bodies are arranged to penetrate transversely along the circumferential direction of the fourth trough body, and the plurality of fifth trough bodies are connected to the third channel.

[0011] In a specific embodiment of the above-mentioned micro-reaction heat exchanger, the fifth trough body includes a first connecting part and a second connecting part, one end of the first connecting part is connected to the fourth trough body, the other end of the first connecting part is connected to the second connecting part, and the opening of the first connecting part is smaller than the opening of the second connecting part.

[0012] In a specific embodiment of the above micro-reaction heat exchanger, adjacent heat exchange blocks are staggered so that adjacent fifth tanks in the vertical direction are not connected.

[0013] In a specific embodiment of the above micro-reaction heat exchanger, the shell is further provided with a functional port connected with the first material channel, and the functional port is configured as a temperature detection port and / or a feeding port.

[0014] In a specific embodiment of the above micro-reaction heat exchanger, the first material channel is configured as a channel through which hot materials can pass, and the second material channel is configured as a channel through which cold materials can pass.

[0015] In a specific embodiment of the above-mentioned micro-reaction heat exchanger, the upper connecting device, the lower connecting device and the heat exchange block are all made of graphite material or silicon carbide material.

[0016] In a second aspect, the present invention also provides a control method for a micro-reaction heat exchanger, wherein the micro-reaction heat exchanger adopts the micro-reaction heat exchanger as described above; the control method comprises the following steps: controlling the hot material to flow through the first material channel from top to bottom; controlling the cold material to flow through the second material channel from bottom to top.

[0017] In a specific implementation of the control method of the above-mentioned micro-reaction heat exchanger, the step of "controlling the hot material to flow through the first material channel from top to bottom; controlling the cold material to flow through the second material channel from bottom to top" further includes: first controlling the cold material to flow out through the second material outlet, and then controlling the hot material to flow through the first material channel.

[0018] In the case of adopting the above technical solution, the micro-reaction heat exchanger of the present invention is smaller in overall equipment volume than the traditional heat exchanger under the premise of having the same heat exchange area. The micro-reaction heat exchanger of the present invention has high heat transfer efficiency by countercurrent heat exchange between cold and hot fluids. At the same time, the flow channel flows according to the set route, which will not cause fluid accumulation, thereby ensuring long-term and stable heat exchange. Moreover, the heat exchange material stays in the equipment for a longer time, so that the heat exchange with water is more sufficient, the required heat exchange area is smaller, and the amount of cooling water is reduced, achieving the purpose of energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0020] Figure 1 is a side sectional view of the overall structure of the micro-reaction heat exchanger of the present invention;

[0021] Figure 2 is a top view of the heat exchange block of the present invention;

[0022] Figure 3 is a side cross-sectional view of the heat exchange block of the present invention;

[0023] Figure 4 It is a side cross-sectional view of two heat exchange blocks stacked on each other according to the present invention;

[0024] Figure 5is a flow chart of the steps of the control method of the micro-reaction heat exchanger of the present invention;

[0025] List of reference numerals:

[0026] 1. Upper connecting device; 11. Upper cover plate; 12. Upper head; 13. First material feed port; 2. Heat exchange device; 21. Shell; 22. Heat exchange block; 22-1. Upper heat exchange block; 22-2. Lower heat exchange block; 221. First channel; 2211. First tank body; 2212. Second tank body; 2213. Third tank body; 222. Second channel; 2221. Fourth tank body; 2222. Fifth tank body; 223. Third channel; 3. Lower connecting device; 31. Lower cover plate; 32. Lower head; 33. First material discharge port; 4. Second material feed port; 5. Second material discharge port; 6. Function port. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not used to limit the scope of protection of the present invention. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0028] It should be noted that in the description of the present invention, the terms "inner", "center", "lateral", "circumferential" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the relevant devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the ordinal numbers "first", "second", "third", "fourth", "fifth", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, it should be noted that in the description of the present invention, although the various steps of the control method of the present invention are described in this application in a specific order, these orders are not restrictive. Without departing from the basic principles of the present invention, those skilled in the art can perform the steps in a different order.

[0031] See first Figure 1, which is a side cross-sectional view of the overall structure of the micro-reaction heat exchanger. Figure 1 As shown, the micro-reaction heat exchanger includes an upper connecting device 1, a heat exchange device 2, and a lower connecting device 3 which are sequentially connected from top to bottom. The heat exchange device 2 includes a shell 21 and a heat exchange component arranged in the shell 21, the heat exchange component includes a plurality of heat exchange blocks 22 stacked on each other, the placement directions of adjacent heat exchange blocks 22 are opposite, a first end surface of the heat exchange block 22 is provided with a first channel 221, a second end surface of the heat exchange block 22 is provided with a second channel 222, a third channel 223 is provided between the shell 21 and the heat exchange component, the first channel 221 and the second channel 222 are not connected to each other, a plurality of first channels 221 are connected to each other to form a first material channel with a continuous bending structure, and a plurality of second channels 222 and the third channel 223 are connected to each other to form a second material channel with a continuous bending structure. The upper connecting device 1 includes an upper cover plate 11 and an upper sealing head 12. The upper connecting device 1 is provided with a first material feed port 13. The lower connecting device 3 includes a lower cover plate 31 and a lower sealing head 32. The lower connecting device 3 is provided with a first material discharge port 33. The first material feed port 13 and the first material discharge port 33 are respectively connected to the first material channel. The upper end of the shell 21 is provided with a second material discharge port 5. The lower end of the shell 21 is provided with a second material feed port 4. The second material feed port 4 and the second material discharge port 5 are respectively connected to the second material channel. The flow path of the first material in the first material channel and the flow path of the second material in the second material channel are respectively as shown in FIG. Figure 1 Indicated by the direction of the arrow.

[0032] In the above structure, the first material channel and the second material channel are respectively fed with corresponding materials, and flow along their respective routes, without causing fluid accumulation. At the same time, the flow paths of the two materials are both serpentine paths, which can make the two materials more fully contact each other, and to a certain extent, can make the volume of the overall equipment smaller, the heat exchange area larger, and the precision of heat exchange higher. In addition, the heat exchange between the two materials is intermittent countercurrent heat exchange, which further improves the heat exchange efficiency, and by controlling the flow of each material in each channel, precise temperature control is achieved, thereby realizing precise control of the material.

[0033] Further, see Figure 2 and Figure 3 As shown in FIG. 1 , this figure is a schematic diagram of the structure of the heat exchange block 22. Figure 3 As shown, the first end surface of the heat exchange block 22 described below is the upper end surface of the heat exchange block 22, and the second end surface of the heat exchange block 22 described below is the lower end surface of the heat exchange block 22. Figure 2 and Figure 3As shown, the first channel 221 includes a first trough body 2211, a plurality of second trough bodies 2212 and a plurality of third trough bodies 2213 that are interconnected. The first trough body 2211 is arranged at the center of the first end surface of the heat exchange block 22, the plurality of second trough bodies 2212 are arranged transversely along the circumferential direction of the first trough body 2211, and the plurality of third trough bodies 2213 are arranged longitudinally through the heat exchange block 22. Specifically, the first trough body 2211 of the heat exchange block 22 located at the top of the heat exchange device 2 is connected to the first material feed port 13, and the first trough body 2211 of the heat exchange block 22 located at the bottom of the heat exchange device 2 is connected to the first material discharge port 33. Since the placement directions of adjacent heat exchange blocks 22 are opposite, that is, the third trough bodies 2213 of the upper heat exchange block 22-1 and the lower heat exchange block 22-2 are interconnected (as shown in FIG. 1 ). Figure 4 The specific flow path is that the material flows into the second trough 2212 through the first trough 2211 of the upper heat exchange block 22-1, and flows into the third trough 2213 of the lower heat exchange block 22-2 along the third trough 2213, and then converges to the first trough 2211 through the second trough 2212, and repeats this process.

[0034] Continue as Figure 2 and Figure 3 As shown, the second channel 222 includes a fourth slot body 2221 and a plurality of fifth slot bodies 2222 that are interconnected, the fourth slot body 2221 is arranged at the center of the second end surface of the heat exchange block 22, and the plurality of fifth slot bodies 2222 are arranged to be transversely penetrated along the circumferential direction of the fourth slot body 2221, and the plurality of fifth slot bodies 2222 are connected to the third channel 223, and adjacent heat exchange blocks 22 are staggered so that adjacent fifth slot bodies 2222 in the vertical direction are not connected. Specifically, the fifth slot body 2222 and the second slot body 2212 are staggered in the vertical direction, and the two are not connected to each other. Based on the upper heat exchange block 22-1 and the lower heat exchange block 22-2 described above, when adjacent heat exchange blocks 22 are stacked on each other, the fourth tank bodies 2221 of the upper heat exchange block 22-1 and the lower heat exchange block 22-2 are connected to each other, and because the fifth tank bodies 2222 between adjacent heat exchange blocks 22 are not connected to each other, the material does not flow directly into the fifth tank body 2222 of the lower heat exchange block 22-2 after flowing out through the fifth tank body 2222 of the upper heat exchange block 22-1, but first flows into the fifth tank body 2222 of the lower heat exchange block 22-2 through the third channel 223, and then flows into the fourth tank body 2221 of the lower heat exchange block 22-2, thereby realizing the deflection of the material. Exemplarily, the upper heat exchange block 22-1 and the lower heat exchange block 22-2 are relatively offset by 15 degrees. The specific flow path is that the material first flows into the fifth trough 2222 of the lower heat exchange block 22-2 through the third channel 223, then flows into the fourth trough 2221 of the lower heat exchange block 22-2 and the fourth trough 2221 of the upper heat exchange block 22-1 in sequence, and then flows into the third channel 223 through the fifth trough 2222 of the upper heat exchange block 22-1, and repeats this process.

[0035] Further, continue as Figure 2 and Figure 3 As shown, the fifth trough body 2222 includes a first connecting part and a second connecting part, one end of the first connecting part is connected to the fourth trough body 2221, and the other end of the first connecting part is connected to the second connecting part. The opening of the first connecting part is smaller than the opening of the second connecting part, so that the material can quickly enter the heat exchange block 22 to avoid blockage at the port and affect the heat exchange effect.

[0036] Furthermore, the first material channel is configured as a channel capable of passing hot materials, and the second material channel is configured as a channel capable of passing cold materials. It should be noted that, although the above description is combined with the first material channel being a hot material channel and the second material channel being a cold material channel, this is not restrictive, and those skilled in the art may also make a switch, that is, the first material channel may also be a cold material channel, and the second material channel may also be a hot material channel. However, since hot materials are generally corrosive materials, in addition to the heat exchange block 22 being made of anti-corrosion materials, its shell 21 also needs to be made of anti-corrosion materials or an anti-corrosion coating is added, which will increase the production cost of the equipment to a certain extent, because the preferred solution is that the first material channel is a hot material channel and the second material channel is a cold material channel.

[0037] Furthermore, the upper connecting device 1, the lower connecting device 3 and the heat exchange block 22 are made of graphite or silicon carbide. For example, when graphite is used, it is suitable for heat exchange of corrosive media such as hydrochloric acid, sulfuric acid, acetic acid and phosphoric acid, and when silicon carbide is used, it is suitable for heat exchange of high-concentration sulfuric acid, nitric acid, hydrofluoric acid, mixed acid, sodium hydroxide, bromine-containing and hydrogen bromide gases. The above-mentioned materials refer to the hot materials described in the present invention, and the cold materials generally use cooling water.

[0038] Further, the housing 21 is also provided with a functional port 6 connected to the first material channel, and the functional port 6 is set as a temperature detection port and / or a feeding port. When the functional port 6 is set as a temperature detection port, a temperature detection component is provided at the temperature detection port to monitor the temperature of the hot material in real time. Exemplarily, the temperature detection component is a temperature sensor. When the functional port 6 is set as a feeding port, it is used to add a small amount of material such as an auxiliary material or a catalyst.

[0039] See below Figure 5 , which is a flow chart of the steps of the control method of the micro-reaction heat exchanger of the present invention. Figure 5 As shown, the control method includes the following steps:

[0040] S1, controlling the hot material to flow from top to bottom through the first material channel;

[0041] S2, controlling the cold material to flow from bottom to top through the second material channel.

[0042] Furthermore, the step of "controlling hot materials to flow from top to bottom through the first material channel; controlling cold materials to flow from bottom to top through the second material channel" further includes: first controlling the cold materials to flow out through the second material outlet 5, and then controlling the hot materials to flow through the first material channel.

[0043] In the above steps, the cold material is introduced first, and then the hot material is introduced to ensure the heat exchange effect, and to avoid the problem of low efficiency due to timely heat exchange caused by introducing the hot material first or introducing the cold material and the hot material at the same time.

[0044] Based on the above embodiments and various extended embodiments, the micro-reaction heat exchanger of the present invention is smaller in overall equipment volume than the traditional heat exchanger under the premise of having the same heat exchange area. The micro-reaction heat exchanger of the present invention has high heat transfer efficiency by countercurrent heat exchange between cold and hot fluids. At the same time, the flow channel flows according to the set route, which will not cause fluid accumulation, thereby ensuring long-term and stable heat exchange. Moreover, the heat exchange material stays in the equipment for a longer time, so that the heat exchange with water is more complete, the required heat exchange area is smaller, and the amount of cooling water is reduced, thereby achieving the purpose of energy saving.

[0045] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A micro-reaction heat exchanger, characterized in that: The micro-reaction heat exchanger comprises an upper connecting device, a heat exchange device, and a lower connecting device which are sequentially connected from top to bottom; The heat exchange device comprises a shell and a heat exchange component arranged in the shell, the heat exchange component comprises a plurality of heat exchange blocks stacked on each other, the placement directions of adjacent heat exchange blocks are opposite, a first end surface of the heat exchange block is provided with a first channel, a second end surface of the heat exchange block is provided with a second channel, a third channel is provided between the shell and the heat exchange component, the first channel and the second channel are not connected to each other, a plurality of the first channels are connected to each other to form a first material channel with a continuous bending structure, and a plurality of the second channels and the third channel are connected to each other to form a second material channel with a continuous bending structure; The upper connecting device is provided with a first material feed port, and the lower connecting device is provided with a first material discharge port, and the first material feed port and the first material discharge port are respectively connected to the first material channel; The upper end of the shell is provided with a second material outlet, and the lower end of the shell is provided with a second material feed inlet, and the second material feed inlet and the second material outlet are respectively communicated with the second material channel.

2. The micro-reaction heat exchanger according to claim 1, characterized in that: The first channel includes a first trough body, a plurality of second trough bodies and a plurality of third trough bodies which are interconnected. The first trough body is arranged at the center of the first end surface of the heat exchange block, the plurality of second trough bodies are arranged transversely along the circumferential direction of the first trough body, and the plurality of third trough bodies are arranged longitudinally through the heat exchange block.

3. The micro-reaction heat exchanger according to claim 2, characterized in that: The second channel includes a fourth trough body and a plurality of fifth trough bodies which are interconnected. The fourth trough body is arranged at the center of the second end surface of the heat exchange block. The plurality of fifth trough bodies are arranged transversely through the circumferential direction of the fourth trough body. The plurality of fifth trough bodies are connected to the third channel.

4. The micro-reaction heat exchanger according to claim 3, characterized in that: The fifth slot body includes a first connecting portion and a second connecting portion, one end of the first connecting portion is connected to the fourth slot body, the other end of the first connecting portion is connected to the second connecting portion, and an opening of the first connecting portion is smaller than an opening of the second connecting portion.

5. The micro-reaction heat exchanger according to claim 3 or 4, characterized in that: Adjacent heat exchange blocks are staggered so that adjacent fifth tanks in the vertical direction are not connected.

6. The micro-reaction heat exchanger according to claim 1, characterized in that: The shell is also provided with a functional port connected with the first material channel, and the functional port is configured as a temperature detection port and / or a feeding port.

7. The micro-reaction heat exchanger according to claim 1, characterized in that: The first material channel is configured as a channel through which hot materials can pass, and the second material channel is configured as a channel through which cold materials can pass.

8. The micro-reaction heat exchanger according to claim 1, characterized in that: The upper connecting device, the lower connecting device and the heat exchange block are all made of graphite or silicon carbide.

9. A control method for a micro-reaction heat exchanger, characterized in that: The micro-reaction heat exchanger adopts the micro-reaction heat exchanger as claimed in any one of claims 1 to 8; The control method comprises the following steps: Controlling the hot material to flow from top to bottom through the first material channel; The cold material is controlled to flow from bottom to top through the second material channel.

10. The control method of the micro-reaction heat exchanger according to claim 9, characterized in that: The step of "controlling the hot material to flow through the first material channel from top to bottom; controlling the cold material to flow through the second material channel from bottom to top" further includes: First, the cold material is controlled to flow out through the second material outlet, and then the hot material is controlled to flow through the first material channel.

Images