Search

CN-121977378-A - Cascade cyclic utilization system and method based on tricresyl phosphite reaction waste heat

CN121977378ACN 121977378 ACN121977378 ACN 121977378ACN-121977378-A

Abstract

The invention relates to the technical field of cascade cyclic utilization systems, in particular to a cascade cyclic utilization system and a method based on tricresyl phosphite reaction waste heat, comprising a tank body and a tank cover, wherein the top of the tank cover is communicated with a heat conducting pipe, the tank body and the tank cover are in threaded connection through a plurality of mounting bolts, a plurality of partition boards matched with the inside of the tank body are longitudinally and equidistantly arranged at intervals in the tank body, an annular cavity wall is fixedly connected on the partition boards, the inner cavity of the tank body is divided into a low-temperature cavity, a medium-temperature cavity and a high-temperature cavity from top to bottom by the partition boards and the cavity wall in sequence, the center of the partition plate is provided with a through hole, a temperature control opening and closing assembly is arranged above the through hole, and the outer side of the tank body is longitudinally provided with a plurality of waste heat exchange assemblies.

Inventors

  • ZHANG ZHENG
  • YANG KANG
  • HU WEIBING

Assignees

  • 昌和化学新材料(江苏）有限公司

Dates

Publication Date
20260505
Application Date
20260130

Claims (10)

  1. 1. The gradient cyclic utilization system based on the tricresyl phosphite reaction waste heat comprises a tank body (1) and a tank cover (2) and is characterized in that a heat conducting pipe (21) is communicated with the top of the tank cover (2), the tank body (1) and the tank cover (2) are connected through a plurality of mounting bolts in a threaded mode, a plurality of partition boards (3) which are longitudinally and equidistantly arranged in an interval mode and are matched with the inside of the tank body (1) are fixedly connected with an annular cavity wall (4) on the partition board (3), the partition boards (3) and the cavity wall (4) divide the inner cavity of the tank body (1) into a low-temperature cavity (5), a medium-temperature cavity (6) and a high-temperature cavity (7) from top to bottom in sequence, a through hole (8) is formed in the center of the partition board (3), a temperature control opening and closing component (9) is arranged above the through hole (8), a plurality of waste heat exchange components (10) are longitudinally arranged on the outer side of the tank body (1), and the waste heat exchange components (10) are respectively communicated with the low-temperature cavity (5), the medium-temperature cavity (6) and the high-temperature cavity (7); The temperature control opening and closing assembly (9) comprises an annular mounting table (91), the mounting table (91) is fixedly mounted at the top of the partition board (3) and is coaxially arranged with the through hole (8), an annular mounting groove (92) is formed in the inner side of the mounting table (91), a bimetal ring piece (93) is arranged in the mounting groove (92), a sealing valve plate (94) is arranged below the bimetal ring piece (93), a sealing gasket (95) is fixedly connected to the bottom of the sealing valve plate (94), and a plurality of reset structures (96) which are distributed in a circumferential array are arranged above the sealing valve plate (94).
  2. 2. The gradient recycling system based on the tricresyl phosphite reaction waste heat, which is disclosed in claim 1, is characterized in that an annular heat insulation layer (11) which is matched with the inner wall of the tank body (1) is fixedly arranged, a space is reserved between the heat insulation layer (11) and the cavity wall (4), and heat conducting oil is filled in the space.
  3. 3. The stepped recycling system based on the tricresyl phosphite reaction waste heat according to claim 1, wherein the through hole (8) is a stepped cylindrical hole with small diameter at the upper end and large diameter at the lower end, the diameter of the sealing valve plate (94) is larger than that of the upper end of the through hole (8), and the sealing gasket (95) is matched with the upper end of the through hole (8).
  4. 4. The gradient recycling system based on the reaction waste heat of tricresyl phosphite according to claim 1, wherein a plurality of mounting lugs (97) distributed in a circumferential array are fixedly connected to the outer edge of the bimetal ring piece (93), and a plurality of lug grooves (98) matched with the mounting lugs (97) are formed in the mounting grooves (92).
  5. 5. The gradient recycling system based on the reaction waste heat of tricresyl phosphite according to claim 4, wherein the outer portion of the bimetal ring piece (93) is inserted into the mounting groove (92), a plurality of mounting lugs (97) are inserted into corresponding lug grooves (98) one by one, a plurality of fixing bolts distributed in a circumferential array penetrate through the top of the mounting table (91), and threaded holes matched with the fixing bolts are formed in the mounting lugs (97).
  6. 6. The gradient recycling system based on the tricresyl phosphite reaction waste heat of claim 1 is characterized in that hanging lugs are fixedly connected to the inner edge of the bimetal ring piece (93) and the center of the top of the sealing valve plate (94), and the two hanging lugs are hinged through a hinging rod (99).
  7. 7. The step recycling system based on tricresyl phosphite reaction waste heat according to claim 1, wherein the reset structure (96) comprises a plurality of guide holes (961) penetrating through the top edge of the sealing valve plate (94), guide sleeves (962) are fixedly connected to the tops of the guide holes (961), guide rods (963) which are longitudinally arranged are inserted in the guide holes (961) and the guide sleeves (962), and the bottoms of the guide rods (963) are fixedly connected with the tops of the partition plates (3).
  8. 8. The step recycling system based on the reaction waste heat of tricresyl phosphite of claim 7, wherein external threads are arranged on the upper portion of the guide rod (963), a limit baffle (964) is fixedly connected to the top of the guide rod (963), a limit seat (965) is connected to the outer side threads of the upper portion of the guide rod (963), and a reset compression ring (966) is fixedly connected to the bottom of the limit seat (965).
  9. 9. The step recycling system based on the reaction waste heat of tricresyl phosphite of claim 8, wherein a return spring (967) is sleeved outside the guide rod (963), the bottom end of the return spring (967) is fixedly connected with the top of the guide sleeve (962), and the top end of the return spring (967) is abutted against the bottom of the return pressing ring (966).
  10. 10. The method for using the step recycling system based on the tricresyl phosphite reaction waste heat according to any one of claims 1-9 is characterized in that: Before starting the reaction of tricresyl phosphite, firstly, adjusting the position of the tricresyl phosphite at the upper part of a guide rod (963) through a rotary limiting seat (965), setting a corresponding opening temperature threshold value of each cavity bimetal ring plate (93), downwards adjusting the limiting seat (965), increasing the lower pressure of a reset spring (967), enabling a through hole (8) to be opened corresponding to the cavity at a higher temperature, fixedly connecting a tank cover (2) with the tank body (1) through a mounting bolt after the adjustment is finished, enabling the tricresyl phosphite reaction temperature to be lower at the initial stage of the reaction, enabling a heat source to enter a low-temperature cavity (5) of the tank body (1) through a heat conducting pipe (21), enabling heat conducting oil between the low-temperature cavity (5) and a corresponding heat insulating layer (11) and a cavity wall (4) to be heated, enabling heat to be led out through a corresponding waste heat exchange component (10), enabling a sealing valve plate (94) between the low-temperature cavity (5) and a middle-temperature cavity (6) to be tightly attached to the upper end of the tank body (1) through a sealing pad (95), and keeping the sealing valve plate (6) between the low-temperature cavity (5) and the sealing valve plate (94) in the same state as the high-temperature cavity (6) under the action of the lower pressure of the reset spring (967); S2, as the reaction continues, the reaction temperature gradually rises, when the temperature of a heat source in the low-temperature cavity (5) rises to a set threshold value of the bimetal ring piece (93), the bimetal ring piece (93) deforms, the sealing valve piece (94) is driven to move upwards by the hinge rod (99) against the elastic force of the return spring (967), the sealing valve piece (94) stably rises along the guide rod (963) and the guide sleeve (962) and is separated from the sealing state of the upper end of the through hole (8), the through hole (8) between the low-temperature cavity (5) and the medium-temperature cavity (6) is opened, the heat source enters the medium-temperature cavity (6), and heat is led out through the corresponding waste heat exchange component (10) after the heat conduction oil in the medium-temperature cavity (6) is heated; S3, when the reaction temperature continues to rise and the temperature of the heat source in the medium temperature cavity (6) reaches the set threshold value corresponding to the bimetal ring piece (93), the bimetal ring piece (93) deforms and overcomes the elasticity of the reset spring (967) to drive the sealing valve plate (94) between the medium temperature cavity (6) and the high temperature cavity (7) to move upwards along the guide rod (963), the corresponding through hole (8) is opened, the heat source enters the high temperature cavity (7), and heat is led out through the corresponding waste heat exchange assembly (10) after the heat conduction oil in the high temperature cavity (7) is heated, so that the gradient cyclic utilization of reaction waste heat is realized; And S4, when the temperature in the later reaction period is reduced and the temperature of a heat source in each cavity is lower than the threshold value of the corresponding bimetal ring piece (93), the bimetal ring piece (93) is restored to the original state, the sealing valve piece (94) moves downwards along the guide rod (963) under the elastic force of the return spring (967), the sealing gasket (95) is attached and sealed with the upper end of the through hole (8) again, each cavity is restored to an independent state, and the waste heat leading operation is stopped along with the end of the reaction.

Description

Cascade cyclic utilization system and method based on tricresyl phosphite reaction waste heat Technical Field The invention relates to the technical field of cascade recycling systems, in particular to a cascade recycling system and a cascade recycling method based on tricresyl phosphite reaction waste heat. Background The cascade cyclic utilization system of the reaction waste heat of the tricresyl phosphite is an energy-saving system which is suitable for the production scene of the trimethyl phosphite, and is used for reducing the waste of heat energy in production, reducing the whole energy consumption cost and improving the product yield by stabilizing the temperature of each process step by recycling the reaction waste heat in the processes of synthesis, rectification and the like in a grading manner and adapting different energy consumption requirements step by step, and is a key matched system for taking both energy saving and quality improvement into consideration in the industrial production of the trimethyl phosphite; The tricresyl phosphite reaction has obvious staged temperature characteristics, the initial temperature of the reaction is lower (usually 80-120 ℃) to generate low-grade waste heat, the temperature is gradually increased to 150-250 ℃ along with the reaction, medium-high temperature waste heat is formed, different grade waste heat corresponds to different recycling scenes (for example, the low-temperature waste heat can be used for workshop heating, the high-temperature waste heat can be used for steam power generation or raw material preheating), but the traditional waste heat recovery device mostly adopts a single cavity structure, and the layered isolation design is lacked; in the waste heat recovery device with a single cavity structure, waste heat in all stages can be mixed into the same heat exchange system, accurate recovery according to temperature gradient is difficult to realize, after low-grade waste heat is mixed with medium-high temperature waste heat, the grade of the whole waste heat is lowered, the medium-high temperature waste heat which can be efficiently utilized by high-temperature heat exchange equipment originally can be reduced in energy density due to mixing with the low-temperature waste heat, only a low-efficiency heat exchange scene can be adapted, the waste of energy value of the high-grade waste heat is caused, the low-grade waste heat cannot be utilized in a targeted manner due to the lack of an independent recovery channel, a large amount of waste heat can only be discharged along with tail gas or a cooling system finally, and the whole waste heat utilization rate is lower. Disclosure of Invention The invention aims to provide a gradient recycling system and method based on tricresyl phosphite reaction waste heat, so as to solve the problems in the background art. In order to achieve the above purpose, the present invention provides the following technical solutions: The utility model provides a step cyclic utilization system and method based on tricresyl phosphite reaction waste heat, includes the jar body and cover, the top intercommunication of cover has the heat pipe, jar body and cover are through a plurality of installation bolt threaded connection, jar body inner chamber vertical equidistance interval arrangement have a plurality of baffles with jar internal portion adaptation, fixedly connected with annular chamber wall on the baffle, a plurality of baffle and chamber wall divide into low temperature chamber, well temperature chamber and high temperature chamber with jar body inner chamber from top to bottom in proper order, the through-hole has been seted up in baffle center department, the through-hole top is equipped with the control by temperature change and opens and close the subassembly, jar external side vertically is equipped with a plurality of waste heat exchange assemblies, and a plurality of waste heat exchange assemblies respectively with low temperature chamber, well temperature chamber and high temperature chamber intercommunication, the control by temperature change the subassembly and open and close the annular mount table, mount table fixed mounting is at the baffle top and with the coaxial setting of through-hole, annular mounting groove has been seted up to the mount table inboard, be equipped with bimetal ring piece in the mounting groove, bimetal ring piece below is equipped with the sealing valve block, sealing block bottom fixedly connected with the sealing block bottom is equipped with a plurality of sealing block top and is arranged in a plurality of circumference array and is arranged on the sealing block and is arranged to have a sealing array. As a further optimized content of the invention, the inner wall of the tank body is fixedly provided with an annular heat insulation layer which is matched with the inner wall of the tank body, a space is reserved between the heat insulation layer and the cavity wall, and hea