CN213913695U

CN213913695U - Micro-channel reactor integrating mixed reaction and cooling

Info

Publication number: CN213913695U
Application number: CN202022296764.3U
Authority: CN
Inventors: 毛训亮; 陈云生; 路翠翠; 刘国朋; 赵洪雷; 郜时国
Original assignee: Puyang Eurasian Chemical Technology Co ltd
Current assignee: Puyang Eurasian Chemical Technology Co ltd
Priority date: 2020-10-15
Filing date: 2020-10-15
Publication date: 2021-08-10
Anticipated expiration: 2030-10-15

Abstract

A microchannel reactor integrating mixing, reaction and cooling is formed by connecting an outer tube, a reaction tube, a central distribution tube, a mixing element, a front section, a connecting piece, a refrigerant inlet and outlet, a transition piece and the like, and is more suitable for the reaction of two liquid media which are violent in reaction and cannot be timely dissipated by reaction heat besides being suitable for the mixing of two different liquid media.

Description

Micro-channel reactor integrating mixed reaction and cooling

Technical Field

The utility model relates to a microchannel reaction equipment, in particular to a microchannel reactor which integrates mixed reaction and cooling.

Background

At present, in the production of chemical enterprises, the chemical reaction of liquid substances generally adopts a kettle type operation, i.e. firstly, one substance is added into a kettle in advance, stirring is carried out, then, the other liquid reaction substance is added, but some substances react violently, and once the two substances meet, a violent chemical reaction, such as nitration reaction and the like, is generated. The reaction runaway easily occurs carelessly to cause explosion, the risk of safety accidents is high, and although workers are careful and slowly added during operation, the accidents occur frequently. Therefore, workers always have extreme tension on the nitrification operation of the post, and have great care to lift the liner. It is desirable to improve such hazardous handling and to have better and safer reaction equipment available.

Disclosure of Invention

The utility model aims at providing a collect mixed reaction cooling microchannel reactor as an organic whole, it has solved the realistic problem that exists at present in nitration effectively, enables nitration and realizes essential safety, can fundamentally effectively avoid the emergence of incident. The utility model comprises a connecting piece, a central distribution pipe, an outer pipe, a reaction, a radiating fin, a preposition, a transition piece, a sealing element, a mixing element and a port transition piece, wherein the sealing element is arranged at the two ends of the outer pipe; the two ends of the reaction tube are welded with transition pieces and port transition pieces, the transition pieces and the front section are fixedly connected by connecting pieces, the port of the front section is an inlet of a reaction medium A, one end of the central distribution tube is fixed with the central distribution tube, and the other end of the central distribution tube penetrates through the transition pieces and enters the reaction tube; the reaction medium B inlet is arranged on the front section, the reaction medium B enters an annular cavity formed by the central distribution pipe and the front section from the front section, the annular cavity extends to the transition section and finally enters the reaction pipe, the radiating fins are welded on the outer surface of the reaction pipe, the reaction pipe is internally filled with a mixing element, the end of the reaction pipe is connected with the port transition piece, and the port of the port transition piece is a reactant outlet.

The other end of the central distribution pipe is provided with a plurality of tongue-shaped inclined holes, and the inclination of the tongue-shaped inclined holes is 30-60 degrees; the width of the gap of each tongue-shaped inclined hole is 1-5 mm.

The radiating fins are welded on the outer surface of the reaction tube, the radiating fins are arranged at intervals and uniformly, the length of each radiating fin is 50-100mm, the height of each radiating fin is 8-11mm, and the thickness of each radiating fin is less than or equal to 3 mm.

The opening direction of the inclined opening of the central distribution pipe faces the medium flowing direction, and the first inclined hole is positioned at the refrigerant inlet.

The utility model has the application method that a reaction medium A enters a central distribution pipe from an inlet of the reaction medium A, one end of the central distribution pipe is provided with a plurality of tongue-shaped inclined holes, and the reaction medium A flows out from the tongue-shaped inclined holes on the central distribution pipe; at the moment, another reaction medium B enters the annular cavity outside the central distribution pipe from the inlet on the front section, flows to the reaction pipe through the transition piece, meets the medium A flowing out of the tongue-shaped inclined hole on the central distribution pipe in the flowing process in the reaction pipe, generates violent chemical reaction immediately, and the generated reaction heat is absorbed and removed by a refrigerant through the reaction pipe immediately and cannot be accumulated; then the two reaction media flow in the reaction tube and are mixed and reacted, the reaction heat generated by the reaction media is absorbed and removed by the refrigerant, and the reaction intensity and the reaction heat are in a linear descending trend; in the whole reaction process, the two media instantaneously participate in the reaction in a small amount, no large amount of media participate in the reaction, and out-of-control heat cannot be generated; the front section of the device is used for feeding two reaction media, although the A/B reaction media enter the front section at the same time, the A/B reaction media are not contacted, and the arranged central distribution pipe is temporarily used for isolating the two reaction media so as to avoid reaction; the medium A is led into a set position of the reaction tube, the medium A and the medium B are allowed to contact, the medium B flows in a ring cavity formed by the central distribution tube and the reaction tube, the medium A flows out from the tongue-shaped inclined holes of the distribution tube, the reaction starts at the moment, a plurality of tongue-shaped inclined holes are arranged on the central distribution tube along with the flow of the reaction medium and the successive ejection of the medium A, the reaction also occurs successively, the generated reaction heat is also removed successively, and the generated reaction heat is easy to absorb and remove because the two reaction media are artificially released at intervals, has small and dispersed amount, is continuously and stably mixed and reacts; no large amount of medium participates in the concentrated reaction, the heat out of control can not be generated, safety accidents such as explosion and the like can not happen, and the whole reaction is in a controllable state; the initial reaction is at a refrigerant inlet, the temperature at the refrigerant inlet is low, the temperature difference is large, the reaction heat can be moved out, the downstream heat exchange is considered firstly, the refrigerant inlet and the refrigerant outlet can be replaced according to the condition, the countercurrent heat exchange is realized, and the method is determined according to the actual condition; by adopting the measures, the violent chemical reaction can be generated originally and evolves into the gentle continuous controllable chemical reaction, the essential production safety is realized, the fear of operators to the mind is relieved, and the production is safe and reliable.

The utility model has the following significance: the initial reaction section in the reaction tube is positioned at a refrigerant inlet of the microchannel reactor, the temperature of the initial reaction section is lowest, the heat transfer temperature difference is largest, the heat in the reaction tube can be moved out, and people can not worry about the safety risk of runaway; the reaction tube of the microchannel reactor is internally provided with a mixing element, so that two media can flow in the reaction tube and are mixed and reacted until the reaction is finished; the microchannel reactor is made into a detachable type, the reaction tube can be drawn out from the outer tube, the reaction tube can be conveniently inspected, repaired, welded and washed, the reaction tube can be conveniently replaced, and the production cost is greatly saved.

The device has simple structure, easy material taking and low manufacturing cost; the method can be used for violent reaction media and mixing two different liquid media, and the production is safe and reliable.

Drawings

Fig. 1 is a microchannel reactor integrating mixing, reaction and cooling, wherein 1, a reaction medium a inlet 2, a reaction medium b inlet 3, a connecting piece 4, a central distribution pipe 5, a refrigerant inlet 6, an outer pipe 7, a reaction pipe 8, a radiating fin 9, a refrigerant outlet 10, a reactant outlet 11, a front section 12, a transition piece 13, a sealing element 14, a mixing element 15 and a port transition piece are arranged in the microchannel reactor.

Fig. 2 is a schematic view of the central distribution pipe and the inclined holes, and fig. 4 shows the central distribution pipe 16 and the inclined holes.

Fig. 3 is a top view of the central distribution pipe and the inclined holes, 4, the central distribution pipe 16 and the tongue-shaped inclined holes 16.

Fig. 4 is a schematic view of the heat dissipating fins, in fig. 7, the reaction tube 8, and the heat dissipating fins.

Fig. 5 is a side view of the heat radiating fins, 7, the reaction tube 8, and the heat radiating fins.

Detailed Description

Embodiment 1, the utility model discloses a connecting piece 3, central distribution pipe 4, outer tube 6, reaction tube 7, radiating fin 8, leading section 11, transition piece 12, sealing element 13, mixing element 14, port transition piece 15, sealing element 13 is installed at outer tube 6 both ends, the welding of outer tube 6 both ends has refrigerant import 5 and refrigerant export 9, installs reaction tube 7 in the outer tube 6, and its reaction tube 7 welds radiating fin 8 on the outward appearance; the two ends of the reaction tube 7 are welded with

transition pieces

12 and 15, the transition pieces 12 and the front section 11 are fixedly connected by a connecting piece 3, the port of the front section 11 is a reaction medium A inlet 1, one end of a central distribution tube 4 is fixed with the central distribution tube, and the other end of the central distribution tube 4 penetrates through the transition pieces 12 to enter the reaction tube 7; the reaction medium B inlet 2 is arranged on the front section 11, the reaction medium B enters an annular cavity formed by the central distribution pipe 4 and the front section 11 from the reaction medium B, the annular cavity extends to the transition piece 12 and finally enters the reaction pipe 7, the radiating fins 8 are welded on the outer surface of the reaction pipe 7, the reaction pipe 7 is filled with the mixing element 14, the end of the reaction pipe 7 is connected with the port transition piece 15, and the port of the port transition piece 15 is a reactant outlet 10.

In the embodiment 2, a plurality of tongue-shaped inclined holes 16 are formed in the other end of the central distribution pipe 4, and the inclination of the inclined holes is 30-60 degrees; the width of the gap of each tongue-shaped inclined hole 16 is 1-5 mm.

In the embodiment 3, the heat dissipation fins 8 are welded on the outer surface of the reaction tube 7, the heat dissipation fins 8 are arranged at intervals and uniformly, the length of each heat dissipation fin 8 is 50-100mm, the height is 8-11mm, and the thickness is less than or equal to 3 mm.

In embodiment 4, the opening direction of the bevel opening of the central distribution pipe 4 faces the medium flowing direction, and the first bevel hole position is located at the refrigerant inlet.

Example 5, the utility model discloses an application method is, reaction medium first gets into central distribution pipe 4 from reaction medium first import 1, and central distribution pipe 4 one end is equipped with a plurality of tongue shape inclined holes 16, and reaction medium first just flows out from tongue shape inclined hole 16 on central distribution pipe 4; at the moment, another reaction medium B enters the annular cavity outside the central distribution pipe 4 from the inlet 2 on the front section 11, flows to the reaction pipe 7 through the transition piece 12, meets the medium A flowing out of the tongue-shaped inclined hole 16 on the central distribution pipe 4 in the flowing process in the reaction pipe 7, generates violent chemical reaction immediately, and the generated reaction heat is absorbed and removed by a refrigerant through the reaction pipe 7 quickly, so that the heat cannot be accumulated; then the two reaction media flow in the reaction tube 7 and are mixed and reacted, the reaction heat generated by the reaction media is absorbed and removed by the refrigerant, and the reaction intensity and the reaction heat are in a linear descending trend; in the whole reaction process, the two media instantaneously participate in the reaction in a small amount, no large amount of media participate in the reaction, and out-of-control heat cannot be generated, moreover, the reaction tubes 7 are all in the refrigerant, and the radiating fins 8 on the outer walls of the reaction tubes 7 are added, so that the radiating effect is enhanced; the front section 11 of the device is used for feeding two reaction media, although the A/B reaction media enter the front section 11 at the same time, the A/B reaction media are not contacted, and the central distribution pipe 4 is temporarily used for isolating the two reaction media so as to avoid reaction; the medium A is led into a set part of the reaction tube 7, the medium A and the medium B are allowed to contact, the medium B flows in a ring cavity formed by the central distribution tube 4 and the reaction tube 7, at the moment, the medium A flows out from the tongue-shaped inclined holes 16 of the distribution tube 4, the reaction starts to occur, a plurality of tongue-shaped inclined holes 16 are arranged on the central distribution tube 4 along with the time and the flow of the reaction medium, the reaction of the medium A continuously occurs along with the continuous ejection of the medium A, and the generated reaction heat is also removed continuously; no large amount of medium participates in the concentrated reaction, the heat out of control can not be generated, safety accidents such as explosion and the like can not happen, and the whole reaction is in a controllable state; the initial reaction is at a refrigerant inlet, the temperature at the refrigerant inlet is low, the temperature difference is large, the reaction heat can be moved out, the downstream heat exchange is considered firstly, the refrigerant inlet and the refrigerant outlet can be replaced according to the condition, the countercurrent heat exchange is realized, and the method is determined according to the actual condition; by adopting the measures, the violent chemical reaction can be generated originally and evolves into the gentle continuous controllable chemical reaction, the essential production safety is realized, the fear of operators to the mind is relieved, and the production is safe and reliable.

Claims

1. The utility model provides a collection mixes microchannel reactor that reaction cooling is as an organic whole, it includes connecting piece (3), central distribution pipe (4), outer tube (6), reaction tube (7), radiating fin (8), leading section (11), transition piece (12), sealing element (13), mixing element (14), port transition piece (15), characterized by: sealing elements (13) are installed at two ends of the outer pipe (6), a refrigerant inlet (5) and a refrigerant outlet (9) are welded at two ends of the outer pipe (6), a reaction pipe (7) is installed in the outer pipe (6), and radiating fins (8) are welded on the outer surface of the reaction pipe (7); transition pieces (12) and port transition pieces (15) are welded at two ends of the reaction tube (7), the transition pieces (12) and the front section (11) are fixedly connected through connecting pieces (3), a port of the front section (11) is a reaction medium A inlet (1), one end of a central distribution tube (4) is fixed with the central distribution tube, and the other end of the central distribution tube (4) penetrates through the transition pieces (12) to enter the reaction tube (7); reaction medium second import (2) sets up on leading section (11), reaction medium second from this gets into by central distribution pipe (4) and leading section (11) formation in the ring chamber, and the ring chamber extends to transition piece (12) and finally enters into reaction tube (7), the welding of reaction tube (7) outward appearance has radiating fin (8), its reaction tube (7) intussuseption is filled with mixing element (14), the end of reaction tube (7) is connected with port transition piece (15), the port of port transition piece (15) is reactant export (10).

2. The microchannel reactor of claim 1, wherein the microchannel reactor integrates mixing, reaction and cooling, and is characterized in that: the other end of the central distribution pipe (4) is provided with a plurality of tongue-shaped inclined holes (16), and the inclination of the inclined holes is 30-60 degrees; the width of the gap of each tongue-shaped inclined hole (16) is 1-5 mm.

3. The microchannel reactor of claim 1, wherein the microchannel reactor integrates mixing, reaction and cooling, and is characterized in that: the radiating fins (8) are welded on the outer surface of the reaction tube (7), the radiating fins (8) are arranged at intervals and uniformly, the length of each radiating fin (8) is 50-100mm, the height of each radiating fin is 8-11mm, and the thickness of each radiating fin is less than or equal to 3 mm.

4. The microchannel reactor of claim 1, wherein the microchannel reactor integrates mixing, reaction and cooling, and is characterized in that: the opening direction of the tongue-shaped inclined hole (16) of the central distribution pipe (4) faces the medium flowing direction, and the mounting position of the first tongue-shaped inclined hole is positioned at the refrigerant inlet (5).