Tubular reactor for chemical industry

Abstract

The utility model discloses a tubular reactor for chemical industry, which comprises a tube body, an inlet and an outlet, the inlet and the outlet are positioned on the tube body, a tube flange is arranged at the outlet of the inlet, a flange blind plate is connected onto the tube flange, a thermocouple and an air inlet pipe are arranged on the flange blind plate, and the thermocouple extends into the tube body; the heat preservation box is connected to the outer portion of the pipe body, the pipe body is located on the center line of the heat preservation box, a first heat preservation layer and a second heat preservation layer are arranged between the heat preservation box and the pipe body from outside to inside, a cavity is formed between the second heat preservation layer and the pipe body, and an electric heating wire is arranged in the cavity; a sintering net is arranged in the pipe body, and the sintering net is arranged at the position of the cavity. The tubular reactor for the chemical industry, provided by the utility model, is better in heat retaining property, can improve the catalytic efficiency and reduce the energy consumption for chemical reaction with higher temperature control precision, and is higher in practicability.

Description

Technical Field

[0001] The utility model belongs to the technical field of tubular reactors, in particular to a tubular reactor for chemical industry. Background Art

[0002] Catalysts are substances that can change the chemical reaction rate of reactants in chemical reactions without changing the chemical equilibrium, and whose weight and chemical properties do not change before and after the chemical reaction. They are widely used in chemical experiments.

[0003] Tubular reactors are widely used in the characterization of catalyst reaction performance. At present, tubular reactors are generally heated by an external heating furnace or electrically heated, and the reaction tube is in the heating furnace. The invention patent with announcement number CN 106807307 B discloses a transparent tubular reactor. The transparent tubular reactor provided by the patent enables observers to observe the state and color changes of the catalyst in time, which is very convenient. However, its thermal insulation performance is poor, and for processes with high temperature requirements, the reaction efficiency is low, and the energy consumption is high. There is a greater safety risk when reacting with toxic and harmful raw materials. Utility Model Content

[0004] The utility model aims to provide a tubular reactor for chemical industry in view of the deficiencies of the prior art, so as to solve the problems of poor thermal insulation and high energy consumption of the tubular reactor in the prior art.

[0005] The technical purpose of this utility model is achieved through the following technical solutions:

[0006] A tubular reactor for chemical industry comprises a tube body and an inlet and an outlet on the tube body, the inlet and the outlet are provided with a tube flange, the tube flange is connected to a flange blind plate, a thermocouple and an air inlet pipe are provided on the flange blind plate, and the thermocouple extends into the tube body; further comprising a heat preservation box connected to the outside of the tube body, the tube body is located on the center line of the heat preservation box, a first heat preservation layer and a second heat preservation layer are provided between the heat preservation box and the tube body from outside to inside, a cavity is provided between the second heat preservation layer and the tube body, and a heating wire is provided in the cavity; a sintered mesh is provided in the tube body, and the sintered mesh is arranged at the cavity.

[0007] Preferably, the air inlet pipe is connected to a protective air pipe, and the protective air pipe is provided with a safety valve.

[0008] Preferably, the sintered mesh is configured as a partial spherical surface and protrudes toward the inlet.

[0009] Preferably, the particle size of the sintered mesh is 100 mesh to 200 mesh.

[0010] Preferably, the upper layer of the sintered mesh is provided with a Monel 400 material layer.

[0011] Preferably, a ring platform is provided in the tube body, and the sintered mesh is placed on the ring platform.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model provides a tubular reactor for chemical industry, which has good thermal insulation performance, can improve catalytic efficiency for chemical reactions with high temperature control accuracy, and can reduce energy consumption, thus having strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a schematic structural diagram of an embodiment.

[0015] Figure 2 The utility model is a structural schematic diagram of a sintered mesh in one embodiment.

[0016] In the above drawings:

[0017] 1. Pipe body; 2. Inlet; 3. Pipe flange; 4. Flange blind plate; 5. Thermocouple; 6. Air inlet pipe; 7. Insulation box; 8. First insulation layer; 9. Second insulation layer; 10. Cavity; 11. Heating wire; 12. Sintered mesh; 13. Outlet; 14. Protective air pipe; 15. Safety valve; 16. Ring platform. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] As a preferred embodiment of a chemical tubular reactor of the utility model, Figure 1 and Figure 2As shown, this embodiment provides a chemical tubular reactor, including a tube body 1 and an inlet 2 and an outlet 13 located on the tube body 1, the inner diameter of the tube body is 25-30 mm, the tube length: the length of the effective heating area of ​​the tube body is 100 mm-200 mm, and the tube length can be increased according to the standard equipment, but cannot be reduced, the inlet 1 is provided with a tube flange 3, and the tube flange 3 is connected to a flange blind plate 4 The flange blind plate 4 is provided with a thermocouple 5 and an air inlet pipe 6, and the thermocouple 5 extends into the tube body 1 to monitor the temperature inside the tube and accurately control the temperature inside the tube. The temperature inside the tube can be controlled between 150-600°C according to the reaction process requirements; it also includes an insulation box 7 connected to the outside of the tube body 1, the tube body 1 is located on the center line of the insulation box 7, and a first insulation layer 8 and a second insulation layer 9 are provided between the insulation box 7 and the tube body 1 from the outside to the inside, and a cavity 10 is provided between the second insulation layer 9 and the tube body 1, and a heating wire 11 is provided in the cavity 10; a sintered mesh 12 is provided in the tube body 1, and the sintered mesh 12 is arranged at the cavity 10.

[0020] In some specific reaction processes, a protective gas pipe 14 is connected to the air inlet pipe 6 , and a safety valve 15 is provided on the protective gas pipe 14 for use in catalytic processes that require the introduction of protective gas.

[0021] In some preferred embodiments, the sintered mesh 12 is constructed as a partial spherical surface and protrudes toward the inlet 2. Generally, the sintered mesh is set as a plane. In this embodiment, the structure of the sintered mesh 12 is set to a spherical surface with a certain curvature. When the gas is introduced and reacts with the catalyst placed on the sintered mesh, the flow direction of the reaction gas can be changed, the reaction path and reaction time can be extended, and it is beneficial to improve the catalytic efficiency.

[0022] In some embodiments, the particle size of the sintered mesh 12 can be selected as 100 mesh-200 mesh, such as 110 mesh, 120 mesh, 150 mesh, 160 mesh, 180 mesh, etc., according to catalytic requirements.

[0023] In some preferred embodiments, in order to improve the performance of the sintered mesh, a Monel 400 material layer is provided on the upper layer of the sintered mesh 12 in this embodiment.

[0024] In other embodiments, the sintered mesh 12 needs to be replaced after long-term use. To facilitate quick replacement, in this embodiment, a ring platform 16 is provided in the tube body 1 , and the sintered mesh 12 is placed on the ring platform 16 .

[0025] During operation, a catalyst is placed on the sintering net, and the reaction gas is introduced from the air inlet pipe. When a protective gas needs to be introduced, the protective gas is introduced from the protective gas pipe. The temperature of the reaction area is monitored by a thermocouple, and the heating power of the heating wire is adjusted as needed to accurately control the catalytic temperature. The reaction area is protected by the first thermal insulation layer and the second thermal insulation layer to reduce heat loss, thereby improving the catalytic efficiency on the one hand and reducing energy consumption on the other.

[0026] When the sintered mesh needs to be replaced, the flange blind plate is disassembled from the pipe flange, and the sintered mesh is taken out from the inlet of the pipe body for replacement.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A tubular reactor for chemical industry, comprising a tube body and an inlet and an outlet located on the tube body, characterized in that: The inlet and outlet are provided with a pipe flange, a flange blind plate is connected to the pipe flange, a thermocouple and an air inlet pipe are provided on the flange blind plate, and the thermocouple extends into the pipe body; it also includes an insulation box connected to the outside of the pipe body, the pipe body is located on the center line of the insulation box, a first insulation layer and a second insulation layer are provided between the insulation box and the pipe body from the outside to the inside, a cavity is provided between the second insulation layer and the pipe body, and a heating wire is provided in the cavity; a sintered mesh is provided in the pipe body, and the sintered mesh is arranged at the cavity.

2. A chemical tubular reactor according to claim 1, characterized in that: The air inlet pipe is connected with a protective air pipe, and the protective air pipe is provided with a safety valve.

3. A tubular reactor for chemical industry according to claim 1, characterized in that: The sintered mesh is configured as a partial spherical surface and protrudes toward the inlet.

4. A chemical tubular reactor according to claim 1, characterized in that: The particle size specification of the sintered mesh is 100 mesh-200 mesh.

5. A chemical tubular reactor according to claim 1, characterized in that: The upper layer of the sintered mesh is provided with a Monel 400 material layer.

6. A chemical tubular reactor according to claim 1, characterized in that: A ring platform is arranged in the tube body, and the sintered mesh is placed on the ring platform.

Images