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CN-121972091-A - Spiral plate type fixed bed reactor for exothermic synthesis reaction

CN121972091ACN 121972091 ACN121972091 ACN 121972091ACN-121972091-A

Abstract

The invention relates to the technical field of fixed bed reactors, in particular to a spiral plate type fixed bed reactor for synthesizing exothermic reaction, which comprises a shell and two spiral plates arranged in the shell in parallel, wherein the two spiral plates form a heat exchange channel and a reaction channel, an inclined plate and through holes are arranged in the heat exchange channel, the inclined plate is obliquely arranged in the heat exchange channel, the bottom of the inclined plate is fixedly connected with the heat exchange channel, a gap is reserved between the upper part of the inclined plate and the upper part of the heat exchange channel, the through holes horizontally penetrate through the inclined plate, and a plurality of through holes are arranged in the extending direction of the inclined plate. The invention provides stable temperature environment for the whole reaction process, thereby improving the overall reaction efficiency and the product purity.

Inventors

  • LI YUQIANG

Assignees

  • 内蒙古圣龙大地科技有限公司

Dates

Publication Date
20260505
Application Date
20260225

Claims (10)

  1. 1. A spiral plate type fixed bed reactor for synthesizing exothermic reaction comprises a shell (1) and two spiral plates (2) which are arranged in parallel in the shell (1), wherein the two spiral plates (2) form a heat exchange channel (21) and a reaction channel (22); The heat exchange device is characterized in that an inclined plate (211) and a through hole (212) are arranged in the heat exchange channel (21); The inclined plate (211) is obliquely arranged in the heat exchange channel (21), the bottom of the inclined plate (211) is fixedly connected with the heat exchange channel (21), and a gap is reserved between the upper part of the inclined plate (211) and the upper part of the heat exchange channel (21); The through holes (212) are horizontally penetrated and formed in the inclined plate (211), and a plurality of through holes (212) are arranged in the extending direction of the inclined plate (211).
  2. 2. A spiral plate type fixed bed reactor for exothermic reaction of synthesis according to claim 1, wherein a plurality of heat radiating fins (213) are fixedly provided on the outer side wall of the heat exchanging channel (21).
  3. 3. A spiral plate type fixed bed reactor for exothermic reaction of synthesis according to claim 2, wherein the radiating fins (213) are distributed in progressively increasing number from outside to inside on the side wall of the heat exchanging channel (21).
  4. 4. A spiral plate type fixed bed reactor for exothermic reaction synthesis according to claim 1, wherein a return pipe (23) communicating with the heat exchanging channel (21) is provided at the center of the heat exchanging channel (21), and an upper portion of the return pipe (23) vertically passes through an upper portion of the housing (1) and protrudes.
  5. 5. A spiral plate type fixed bed reactor for synthesizing exothermic reaction according to claim 4, wherein a surrounding sleeve (3) is arranged at the upper part of the shell (1), the surrounding sleeve (3) is of an annular structure and surrounds the return pipe (23), the surrounding sleeve (3) and the outer wall of the return pipe (23) form an annular cavity, the annular cavity is communicated with the shell (1), and a plurality of inlet ports (31) for liquid or gas to enter are formed in the side wall of the surrounding sleeve (3).
  6. 6. A spiral plate type fixed bed reactor for exothermic reaction of synthesis according to claim 1, wherein a plurality of liquid inlet pipes (214) are vertically provided at the end of the heat exchanging channel (21) located at the outer ring.
  7. 7. A spiral plate type fixed bed reactor for exothermic reaction according to claim 6, wherein a main pipe (215) is vertically provided at one side of the housing (1), and the liquid inlet pipe (214) is connected to the main pipe (215) through the side wall of the housing (1).
  8. 8. The spiral plate type fixed bed reactor for exothermic reaction of synthesis according to claim 6, wherein a shielding plate (24) is provided at an upper portion of the liquid inlet pipe (214), the shielding plate (24) is of a ring-shaped structure, and the shielding plate (24) is fixedly provided on an inner wall of the housing (1).
  9. 9. A spiral plate type fixed bed reactor for synthesizing exothermic reaction according to claim 8, wherein a first diversion slope (241) is provided at the upper portion of the shielding plate (24), the first diversion slope (241) is of an annular structure, and the height of the inner ring of the first diversion slope (241) is lower than the height of the outer ring.
  10. 10. A spiral plate type fixed bed reactor for exothermic reaction synthesis according to claim 1, wherein a second diversion slope (216) is arranged at the upper part of the heat exchange channel (21), the second diversion slope (216) is of a spiral structure, and the upper part of the second diversion slope (216) is of a pointed structure.

Description

Spiral plate type fixed bed reactor for exothermic synthesis reaction Technical Field The invention relates to the technical field of fixed bed reactors, in particular to a spiral plate type fixed bed reactor for exothermic synthesis reaction. Background Most of the existing fixed bed reactors are of cylindrical structures, but the traditional tubular fixed bed reactors have the defects of small heat transfer coefficient, low utilization rate of catalyst bed space and the like. Chinese patent publication No. CN108114672B discloses a soaking type spiral plate fixed bed reactor for gas-solid phase contact catalytic reaction, which comprises gas phase and inlet and outlet of heat exchange medium, one or more spiral plate type fixed bed reaction sections are arranged in the reactor. The structure of the spiral plate type fixed bed reaction section is similar to that of a spiral plate heat exchanger, two parallel metal plates are rolled into two spiral channels, the upper end and the lower end of one channel are closed and used as heat exchange medium channels, heat exchange medium flows through the spiral channels and exchanges heat through the plate wall, and flows out of a heat exchange medium outlet connected with the central tube after reaching the central tube of the reactor, a fixed bed layer is formed after filling a catalyst, the uppermost end of the bed layer is communicated with a gas inlet, the lowermost end of the bed layer is communicated with the gas outlet, gas enters the reactor from the inlet, and is discharged from the gas outlet after axially passing through the catalyst fixed bed layer for reaction. Compared with the traditional fixed bed reactor, the scheme has better heat uniformity, but when the scheme is used for synthesizing exothermic reaction, the temperature difference phenomenon still exists, and the scheme is characterized in that during the reaction, gas or liquid is introduced from the upper part of the fixed bed reactor, and the reaction is accelerated and the exothermic reaction is carried out when passing through a catalyst, and the scheme has a spiral structure, so that the heat in the fixed bed reactor is larger than the heat outside. Disclosure of Invention According to the spiral plate type fixed bed reactor for the synthetic exothermic reaction, through the inclined plate with the through holes arranged in the heat exchange channel, the lower-layer low-temperature heat exchange medium is guided to flow to the upper layer and be mixed with the upper-layer high-temperature medium, meanwhile, smooth circulation of the heat exchange medium is guaranteed, and the axial temperature difference of the reactor is effectively balanced. The design ensures that the heat exchange medium can realize the fluctuation alternate flow in the vertical direction, improves the heat exchange uniformity, and avoids the unbalanced state of high temperature in the upper half section and low temperature in the lower half section of the reaction channel. In order to solve the problems in the prior art, the invention provides a spiral plate type fixed bed reactor for synthesizing exothermic reaction, which comprises a shell and two spiral plates arranged in the shell in parallel, wherein the two spiral plates form a heat exchange channel and a reaction channel; an inclined plate and a through hole are arranged in the heat exchange channel; The inclined plate is obliquely arranged in the heat exchange channel, the bottom of the inclined plate is fixedly connected with the heat exchange channel, and a gap is reserved between the upper part of the inclined plate and the upper part of the heat exchange channel; the through holes horizontally penetrate through and are formed in the inclined plate, and a plurality of through holes are formed in the extending direction of the inclined plate. Preferably, a plurality of heat radiating fins are fixedly arranged on the outer side wall of the heat exchange channel. Preferably, the number of the radiating fins is gradually increased from outside to inside on the side wall of the heat exchange channel. Preferably, a return pipe communicated with the heat exchange channel is arranged in the center of the heat exchange channel, and the upper part of the return pipe vertically penetrates through the upper part of the shell and extends out. Preferably, a surrounding sleeve is arranged at the upper part of the shell, the surrounding sleeve is of an annular structure and surrounds the return pipe, an annular cavity is formed between the surrounding sleeve and the outer wall of the return pipe, the annular cavity is communicated with the shell, and a plurality of inlet ports for liquid or gas to enter are formed in the side wall of the surrounding sleeve. Preferably, a plurality of liquid inlet pipes are vertically arranged at the end part of the heat exchange channel, which is positioned on the outer ring. Preferably, a main pipeline is vertically arranged on one side o