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CN-121972113-A - Be applied to scale deposit device of nitro-to-amino hydrogenation ware

CN121972113ACN 121972113 ACN121972113 ACN 121972113ACN-121972113-A

Abstract

The invention discloses a scale deposition device applied to a nitro-to-amino hydrogenation reactor, and particularly relates to the field of chemical equipment, comprising a lower tank, an upper tank cover arranged at the upper end of the lower tank, a switch mechanism arranged in the lower tank and a filter basket arranged on the switch mechanism; the switch mechanism comprises a lower pore plate and an upper pore plate arranged above the lower pore plate, wherein the upper pore plate comprises a lower plate, a middle plate and an upper plate, a plurality of bottom holes, first through holes, second through holes and third through holes which are in one-to-one correspondence are respectively formed in the circumferential directions of the surfaces of the lower pore plate, the lower plate, the middle plate and the upper plate, filtering holes are formed between every two adjacent through holes, and a filter screen is arranged in each filtering hole. According to the invention, through the arrangement of the lower orifice plate and the upper orifice plate, the purpose of separating the chambers is realized, on one hand, the filter holes can be rotated out to be aligned with the through holes III so as to block the bottoms of the through holes III, and mixed sediments can be prevented from falling into the lower tank or onto the lower plate which is not detached, so that the pollution to reactants or the lower plate is prevented.

Inventors

  • ZHU MINGFEI
  • YANG XIAOXING
  • ZHOU DUO
  • YU YANGYANG

Assignees

  • 葫芦岛天启晟业化工有限公司

Dates

Publication Date
20260505
Application Date
20260409

Claims (10)

  1. 1. The scale deposition device applied to the nitro-to-amino hydrogenation reactor is characterized by comprising a lower tank (2), an upper tank cover (21) arranged at the upper end of the lower tank (2), a switch mechanism arranged in the lower tank (2) and a filter basket (6) arranged on the switch mechanism; The switch mechanism comprises a lower pore plate (3) and an upper pore plate (4) arranged above the lower pore plate (3), the upper pore plate (4) comprises a lower plate (41), a middle plate (42) and an upper plate (43), a plurality of bottom holes (31), first through holes (411), second through holes (421) and third through holes (431) which are in one-to-one correspondence are respectively formed in the circumferential directions of the surfaces of the lower pore plate (3), the lower plate (41), the middle plate (42) and the upper plate (43), filtering holes (422) are formed between adjacent second through holes (421), and filtering screens (423) are arranged in the filtering holes (422); During hydrogenation reaction, the bottom hole (31), the first through hole (411), the second through hole (421) and the third through hole (431) are communicated; when the filter basket (6) is disassembled, the bottom hole (31) is staggered from the first through hole (411), and the third through hole (431) is aligned with the filter hole (422).
  2. 2. The device for fouling of a nitro-to-amine hydrogenation reactor according to claim 1, wherein a driving component (5) is arranged on the outer side of the lower tank (2), the driving component (5) is used for driving the lower pore plate (3) to rotate, a bottom chute (32) is formed in the upper surface of the lower pore plate (3), a first sliding block (412) is fixed at the bottom of the lower plate (41), and the first sliding block (412) slides in the bottom chute (32).
  3. 3. The device for fouling applied to a nitro-to-amine hydrogenation reactor according to claim 2, wherein a first sliding groove (413) is formed in the upper surface of the lower plate (41), a second sliding block (424) is fixed at the bottom of the middle plate (42), the second sliding block (424) slides in the first sliding groove (413), a second sliding groove (425) is formed in the upper surface of the middle plate (42), a third sliding block (432) is fixedly mounted at the bottom of the upper plate (43), and the third sliding block (432) slides in the second sliding groove (425).
  4. 4. A scale deposition device for a nitro-amine hydrogenation reactor according to claim 3, wherein a notch (414) is formed at one end of the first chute (413), the second slider (424) can be moved upwards out of the notch (414), the lower orifice plate (3) is rotatably connected with the first rotating shaft of the middle part of the lower plate (41), and the upper plate (43) is rotatably connected with the middle part of the middle plate (42) through the second rotating shaft.
  5. 5. The device for fouling of a nitro-to-amine hydrogenation reactor according to claim 4, wherein a plurality of limiting blocks (433) are fixedly arranged on the outer side wall of the upper plate (43), a plurality of clamping grooves (201) are formed in the circumferential direction of the top of the lower tank (2), and the limiting blocks (433) are located in the clamping grooves (201).
  6. 6. The scale deposit device for a nitro-amine hydrogenation reactor according to claim 5, wherein the included angle between the connecting lines of the circle centers of two adjacent bottom holes (31) and the circle center of a lower pore plate (3) is alpha, the rotation angle of the lower pore plate (3) is 3 alpha/2, the rotation angle of the lower plate (41) is alpha, and the rotation angle of the middle plate (42) is alpha/2.
  7. 7. The device for fouling of the nitro-amine hydrogenation reactor according to claim 2, wherein the driving assembly (5) comprises a motor (51) arranged on the lower tank (2) and a gear (52) arranged on an output shaft of the motor (51), a plurality of tooth grooves (33) are formed in the side wall of the lower pore plate (3), a side opening (20) is formed in the side wall of the lower tank (2), and the gear (52) is meshed with the tooth grooves (33) at the position of the side opening (20).
  8. 8. A fouling device applied to a nitro-to-amine hydrogenation reactor according to claim 1, wherein the filter basket (6) comprises a filter cartridge (61), the inside of the filter cartridge (61) is provided with a ring cavity (60) for filling filler, the middle part of the filter cartridge (61) is provided with a middle cavity (62), and the bottom of the middle cavity (62) is communicated with a through hole III (431).
  9. 9. The device for fouling of a nitro-to-amine hydrogenation reactor according to claim 8, wherein a top net (63) is arranged at the top of the filter cartridge (61), a ring net (64) is arranged at the outer side of the top net (63), and a cone cover (65) is arranged at the top of the ring net (64).
  10. 10. The device for fouling the nitro-to-amine hydrogenation reactor according to claim 1, wherein a feed port (22) and an exhaust port (23) are arranged at the top of the lower tank (2), and a valve (24) is arranged on the exhaust port (23).

Description

Be applied to scale deposit device of nitro-to-amino hydrogenation ware Technical Field The invention relates to the technical field of chemical equipment, in particular to a scale deposition device applied to a nitro-to-amino hydrogenation reactor. Background The hydrogenation reduction of nitro to amino is the most core and widely used unit reaction for preparing aromatic amine and heterocyclic amine compounds. A hydrogenation reactor is usually adopted, hydrogen is introduced as a reducing agent in the reaction process, and a catalyst is matched, so that specific technological parameters such as temperature, pressure, residence time and the like are controlled to ensure the conversion rate and selectivity of the reaction. However, fouling occurs during the reduction of nitro-groups to amino groups, for example, catalyst attrition, pulverization and deactivation during the reaction, and the resulting fine catalyst powder tends to combine with reaction by-products to form mixed deposits. The prior art filters out these mixed deposits by providing a filled fouling basket, but as there are more and more mixed deposits, the fouling basket needs to be removed for replacement cleaning. The residual hydrogen in the hydrogenation reactor is easy to cause danger and needs to be replaced by nitrogen, but the volume of the hydrogenation reactor is large, the whole replacement directly leads to the increase of the nitrogen consumption and the replacement time, the hydrogen is easy to remain at the corners of internal equipment, and the full-direction replacement can be completed only by continuously introducing nitrogen, so that the replacement period is further prolonged. In order to solve the problems, a switching mechanism with a pore plate structure is additionally arranged below the scale deposit basket, the hydrogenation reactor is divided into two chambers when the scale deposit basket is disassembled, and then, only hydrogen in the chamber where the scale deposit basket is positioned is replaced by introducing nitrogen, so that the replacement of hydrogen in the whole hydrogenation reaction container is not needed, and the replacement period is shortened. However, during the process of disassembling the integral scale basket, part of the mixed sediment can fall into the holes of the upper pore plate when the scale basket is disassembled, and when the holes are re-corresponding by subsequently resetting the upper pore plate, the mixed sediment falling into the holes can fall from the corresponding holes, so that the pollution of reactants is caused. Disclosure of Invention The invention provides a scale deposition device applied to a nitro-to-amino hydrogenation reactor, which aims to solve the problems that after an integral scale deposition basket is disassembled from the existing hydrogenation reaction container, a reset switch mechanism enables holes to correspond again, and mixed sediments falling in the holes can fall from the corresponding holes to cause pollution of reactants. The invention provides a scale deposition device applied to a nitro-amine hydrogenation reactor, which comprises a lower tank, an upper tank cover arranged at the upper end of the lower tank, a switch mechanism arranged in the lower tank and a filter basket arranged on the switch mechanism, wherein the switch mechanism comprises a lower pore plate and an upper pore plate arranged above the lower pore plate, the upper pore plate comprises a lower plate, a middle plate and an upper plate, a plurality of bottom holes, first through holes, second through holes and third through holes which are in one-to-one correspondence are respectively formed in the circumferential direction of the surfaces of the lower pore plate, the lower plate, the middle plate and the upper plate, wherein filter holes are formed between two adjacent through holes, a filter screen is arranged in the filter holes, the bottom holes, the first through holes, the second through holes and the third through holes are communicated in three phases during hydrogenation reaction, and the bottom holes are staggered with the first through holes and the third through holes are aligned with the filter holes during disassembly of the filter basket. Preferably, the outside of lower jar is installed drive assembly, and drive assembly is used for driving the rotation of orifice plate down, and the bottom spout has been seted up to the upper surface of orifice plate down, and the bottom of orifice plate is fixed with slider one, and slider one slides in the inside of bottom spout. Preferably, the upper surface of the lower plate is provided with a first sliding groove, the bottom of the middle plate is fixedly provided with a second sliding block, the second sliding block slides in the first sliding groove, the upper surface of the middle plate is provided with a second sliding groove, the bottom of the upper plate is fixedly provided with a third sliding block, and the third sl