CN216499254U - Solid-phase tackifying reactor and system of integrated bi-component nylon - Google Patents

Abstract

The utility model discloses an integrated two-component nylon solid-phase tackifying reactor and a system thereof; the adopted one-piece two-component nylon solid-phase tackifying reactor connects a preheating section, a reaction section and a cooling section into one body , the slices filled in the preheating section and the reaction section fall directly into the cooling section by their own weight. After preheating and reaction section, the slices are uniformly heated by circulating heating nitrogen, and then enter the cooling section at the lower part of the reactor; The equipment investment and construction investment are greatly saved, and the viscosity rise value (sulfuric acid method) of raw material slices and finished slices can reach up to 1.8. It is used to produce high-quality high-viscosity two-component nylon chips.

Description

Solid-phase viscosifying reactor and system for one-piece two-component nylon

technical field

The utility model belongs to the technical field of two-component high-viscosity nylon chip production technology, in particular to an integrated two-component nylon solid-phase viscosity increasing reactor and a system thereof.

Background technique

Due to the limitation of nylon polymerization technology, the viscosity of chips produced by conventional nylon polymerization devices (sulfuric acid method) ranges from 2.4 to 2.8, and the viscosity of chips produced by two-component high-viscosity nylon polymerization production lines ranges from 3.2 to 3.5. When the high-viscosity chips are produced by bulk polymerization, their quality decreases. The production of two-component high-viscosity chips by solid-phase tackifying technology is an important production method to obtain high-quality high-viscosity chips. The solid-phase polymerization device for preparing high-viscosity two-component nylon chips usually adopts the method of drum batch polymerization or continuous solid-phase polymerization of dryer + solid-phase polymerization reactor + cooler. The drum batch polymerization production operation is troublesome, and the product quality varies greatly from batch to batch; the polycondensation equipment of the dryer + solid phase polymerization reactor + cooler is connected by pipes, and the blanking speed is controlled by a rotary blanking device. The overall height of the device in this method is high, the equipment occupies a large space, and the equipment cost and raw material transportation cost are high. The rotary blanker will also generate additional foam and dust, which will affect the product quality. The technology used has the above disadvantages.

Utility model content

The utility model designs an integrated two-component nylon solid-phase viscosity increasing reactor and its system, which effectively solves the problems listed in the background art.

The structure of the solid-phase viscosity-increasing reactor of the one-piece two-component nylon: the reactor consists of an upper preheating section cylinder, a middle reaction section cylinder, a lower cooling section cylinder, a feed port, a preheating section, and a Hot section air outlet, inner preheating section cone, outer preheating section cone, preheating section air inlet ring, preheating section air inlet, preheating section distribution cone, inner reaction section cone, reaction section air inlet, The distribution cone of the reaction section, the return air cavity of the cooling section, the air outlet of the cooling section, the cone of the cooling section, the air inlet of the cooling section, the distribution cone of the cooling section, the discharge port and the insulation coil of the reactor are composed, and the connection relationship is as follows:

The top of the preheating section cylinder is closed, and is provided with a feed port and a preheating section air outlet, and the bottom of the preheating section cylinder is provided with two layers of inner and outer preheating section cones, both of which are annular. , downwardly open inverted cone; the annular conical cavity between the two-layer preheating section cones forms the preheating section air inlet ring, and the outer preheating section cone corresponding to the preheating section air inlet ring is provided with a preheating section air inlet of the preheating section; inside the cylinder of the preheating section, above the air inlet ring of the preheating section, there is a distribution cone of the preheating section;

The upper part of the reaction section cylinder is open, the reaction section cylinder is sleeved on the outer preheating section cone through this opening, and the reaction section cone is arranged at the bottom of the reaction section cylinder, which is annular and downward. Open inverted cone; the reaction section cone is provided with a reaction section air inlet; inside the reaction section cylinder, above the reaction section air inlet, a reaction section distribution cone is arranged;

The upper part of the cooling section cylinder is open, the cooling section cylinder is sleeved on the reaction section cone through this opening, and the cavity formed between the cooling section cylinder and the reaction section cone is the cooling section return air cavity ; Through the opening of the reaction section cone, the interior of the reaction section cylinder and the cooling section cylinder are communicated; the cooling section air outlet is provided on the outer wall of the cooling section return air cavity to discharge;

The lower structure of the cooling section cylinder is the same as the lower structure of the reaction section cylinder; the bottom of the cooling section cylinder is provided with a cooling section cone; the cooling section cone is a closed inverted cone; on the cooling section cone A cooling section air inlet is arranged; inside the cooling section cylinder, above the cooling section air inlet, a cooling section distribution cone is arranged; a material outlet is arranged at the bottom of the outer cooling section cone.

The reactor thermal insulation coil is a round tube structure, which is evenly wound and fixed on the outer wall of the preheating section and the reaction section cylinder, and several inlets and outlets are set according to the length requirements. The reactor thermal insulation coil is filled with steam or heat-conducting oil as thermal insulation. medium; the process temperature setting of the reactor insulation coil is consistent with the process temperature in the reaction section cylinder.

For the technical solution described above, further, the distribution cone of the preheating section, the distribution cone of the reaction section and the distribution cone of the cooling section are all regular triangular cones with the cone top facing upward, and the cone angle is 30°～60°( 45° or 60° are generally used).

For the above technical solution, further, the diameter of the cylinder of the preheating section is 1-1.2 times the diameter of the cylinder of the reaction section, and the diameter of the cylinder of the cooling section is 0.6-1 times the diameter of the cylinder of the reaction section.

For the technical solution described above, further, the opening diameter of the inner layer preheating section cone is 0.3 to 0.8 times the diameter of the preheating section cylinder; the opening diameter of the reaction section cone is the reaction section cylinder diameter 0.3 to 0.8 times of the diameter of the opening; the diameter of the opening is related to the residence time of the equipment design. Generally, the longer the residence time, the larger the value.

For the technical solution mentioned above, further, the diameter of the bottom surface of the distribution cone of the preheating section is 0.5 to 1.2 times the diameter of the opening of the air inlet ring in the preheating section, and the height of the bottom surface from the cylinder of the reaction section is about 0.2 times the diameter of the bottom surface of the distribution cone. ～0.5 times; the height from the opening of the air inlet ring of the preheating section is about 0.2 to 1.5 times the diameter of the opening.

For the technical solution described above, further, the diameter of the bottom surface of the distribution cone of the reaction section is 0.5 to 0.7 times the diameter of the reaction section, and the value should be determined according to the designed height of the material layer of the reaction section. , the height of the bottom surface from the cylinder of the reaction section is about 0.2 to 0.5 times the diameter of the bottom surface of the distribution cone, and the height from the air inlet of the reaction section is about 0.2 to 1.5 times the diameter of the opening.

For the technical solution described above, further, the diameter of the bottom surface of the cooling section distribution cone is 0.5 to 0.7 times the diameter of the cooling section, and the height from the air inlet of the cooling section is about 0.2 to 1.5 times the diameter of the opening.

Using the solid phase tackifying reactor of the one-piece two-component nylon described above, a system for producing two-component high-viscosity nylon chips, that is, the solid-phase tackifying reactor for the one-piece two-component nylon production of high-viscosity two-component The system of nylon slice, its structure comprises the solid phase viscosity increasing reactor of one-piece two-component nylon, the first fan, the first nitrogen heater, energy-saving heat exchanger, nitrogen cooler I, spray cooling tower, spray water pump , the second fan, deaerator, second nitrogen heater, cooling fan, nitrogen cooler II; the connection relationship is:

The system is also provided with a nitrogen replacement silo, a feeder and a discharger which are used together. Specifically, the raw material low-viscosity two-component nylon chips of the upstream process fall into the solid-phase viscosity increasing reactor of the one-piece two-component nylon through the nitrogen replacement silo, the feeder and the feeding port; .

The air outlet at the top of the preheating section of the solid-phase viscosity-increasing reactor of the one-piece two-component nylon is respectively connected with the inlet of the first fan and the inlet of the energy-saving heat exchanger, and the air outlet of the first fan is connected with the first nitrogen heater through the first nitrogen heater. The air inlet of the preheating section is connected; the outlet of the energy-saving heat exchanger is connected with the nitrogen cooler I and the spray cooling tower in turn, and the spray cooling tower is connected with the second fan, and the air outlet of the second fan is connected with the energy-saving heat exchanger in turn After the deaerator and the second nitrogen heater are connected, they are connected with the air inlet of the reaction section of the solid-phase viscosity-increasing reactor of the integrated two-component nylon;

The spray cooling tower is equipped with a spray water pump as the water circulation power;

A three-way pipeline is arranged on the pipeline between the deaerator and the second nitrogen heater. The pipeline is connected with the air outlet of the cooling section, and the pipeline is also connected with the cooling fan and the nitrogen cooler II. The cooling section of the two-component nylon solid-phase viscosity-increasing reactor is connected to the air inlet. That is to say, the air outlet of the cooling section of the solid-phase tackifying reactor of the one-piece two-component nylon is sequentially connected with the air inlet of the cooling section of the cooling fan, the nitrogen cooler II, and the solid-phase tackifying reactor of the one-piece two-component nylon connected.

Utilizing the solid-phase tackifying reactor of the one-piece two-component nylon described above, the technological process for producing high-viscosity nylon chips is as follows:

The low-viscosity two-component nylon chips enter the solid-phase viscosity increasing reactor of the one-piece two-component nylon from the nitrogen replacement silo through the feeder and the feeding port, and are filled into the one-piece two-component nylon through the feeder and the feeding port. In the upper preheating section and the reaction section cylinder of the solid phase viscosity increasing reactor of the component nylon, the material accumulated in the reactor is controlled by the discharger to gradually fall; the low viscosity nylon chips are placed in the upper preheating section reaction section cylinder The body is fully contacted with high-temperature reaction nitrogen, heated to 130-180°C, and falls into the reaction section to react and increase viscosity; the low-viscosity nylon chips stay in the reaction section cylinder for ~30 hours and fall into the cooling section through the distribution cone mouth of the reaction section. Section cylinder; the slices that have been reacted and thickened in the reaction section cylinder, enter the cooling section cylinder, are cooled to below 38 ℃ by the circulating cold nitrogen, and finally pass through the discharge port set at the bottom of the outer cooling section cone and The feeder is finally sent to the finished product packaging section.

For the technical solution described above, further, in the process that the above-mentioned low-viscosity two-component nylon chips are reacted and thickened by the reaction section barrel, the utilization of the reaction cycle nitrogen is involved, and the utilization process of the reaction cycle nitrogen is as follows :

The reactive nitrogen from the air outlet at the top of the cylinder in the preheating section is divided into two parts. One part is pressurized by the first fan as direct circulating nitrogen and heated by the nitrogen heater and directly enters the air inlet of the preheating section; the other part is passed through the energy-saving heat exchanger. After the initial cooling with the nitrogen cooler, it enters the spray cooling tower for cooling, spray cooling to 12-25 ℃, removes excess water to obtain dehumidified nitrogen, and then passes through the second fan, energy-saving heat exchanger, deaerator, and second nitrogen heating in sequence The reactor enters the one-piece two-component nylon solid-phase viscosity increasing reactor through the air inlet of the reaction section, conducts the solid-phase polycondensation reaction and circulates again;

After the nitrogen from the cooling section is cooled and pressurized by the cooling fan and the nitrogen cooler, it enters the cooling section cylinder of the integrated two-component nylon solid-phase viscosity increasing reactor through the air inlet of the cooling section again for circulation. The ratio of circulating nitrogen flow to slice flow is generally controlled at 1.2 to 2.5.

For the technical solution described above, further, in order to ensure more sufficient and uniform heating or cooling of the slices by nitrogen, the ratio of the flow rate of circulating nitrogen used in the preheating section to the flow rate of the slices is generally controlled at 3.5-6.5. The ratio of the flow rate of circulating nitrogen in the reaction section to the flow rate of the slices is generally controlled at 1.5 to 3.0. For the same equipment, the lower the output, the higher the value, and the higher the required viscosity, the higher the value.

For the technical solution described above, further, in the reaction circulating nitrogen, the ratio of nitrogen dehumidified by the spray cooling tower to the flow rate of the slices is generally controlled at 1.5 to 3.0; by controlling this ratio, the slices can be further controlled. The humidity of nitrogen in the process of increasing the viscosity through the reaction of the cylinder body in the reaction section can adjust the final moisture content of the finished slices within the range of 0.02-0.06%. Therefore, using the partial circulating nitrogen gas described above for cooling and dehumidification of the present invention has obvious energy-saving effect compared with the traditional whole cooling and dehumidification process.

For the technical solution described above, further, after the nitrogen gas from the cooling section is cooled and pressurized by the cooling fan and the nitrogen cooler, it enters the solid-phase viscosity increase of the integrated two-component nylon through the air inlet of the cooling section again. Circulation is carried out in the cylinder of the cooling section of the reactor, and the ratio of the flow rate of the cooling circulating nitrogen gas to the flow rate of the slices is generally controlled at 1.2 to 2.5. The cooling cycle achieves the dual function of cooling and humidification by quantitatively supplementing and replacing the high dew point nitrogen gas processed by the spray system.

The one-piece two-component nylon solid-phase tackifying reactor of the utility model and the method for producing two-component high-viscosity nylon chips using the same are used to produce high-quality high-viscosity nylon chips. Compared with the split-type device of the reactor and the cooler, the utility model saves at least 8m of space in the height of the equipment, can reduce the energy consumption of raw material transportation by about 0.8kw, and save about 6,000 yuan in annual cost; reduce drying and preheating The rotary blanker between the reactor, the reactor and the cooler can reduce the overall crushing rate of the finished chips by about 30ppm. In addition, equipment investment and construction investment have been greatly saved. The viscosity rise value (sulfuric acid method) of raw material slices and finished slices can reach up to 1.8. The maximum viscosity of the product can reach more than 3.5, and the moisture content is in the range of 0.02 to 0.06%.

Description of drawings

Figure 1: Schematic diagram of the structure of the solid-phase tackifying reactor of one-piece two-component nylon;

Fig. 2: Utilize the solid-phase tackifying reactor of the above-mentioned one-piece two-component nylon to produce two-component high-viscosity nylon chips. Process flow schematic diagram;

Among them: 1. Preheating section cylinder, 2. Reaction section cylinder, 3. Cooling section cylinder, 4. Feed inlet, 5. Preheating section air outlet, 6. Inner preheating section cone, 7. Outer preheating section cone, 8. Preheating section air inlet ring, 9. Preheating section distribution cone, 10. Preheating section air inlet, 11. Reactor insulation coil, 12, Inner reaction section cone, 13. Reaction section distribution cone, 14. Reaction section air inlet, 15. Cooling section air return cavity, 16. Cooling section air outlet, 17. Cooling section distribution cone, 18. Cooling section air inlet, 19. Cooling section cone, 20. Discharge port, 21. nitrogen replacement silo, 22. feeder, 23. discharger, 24. first fan, 25. first nitrogen heater, 26. energy-saving heat exchanger, 27. nitrogen cooler 1 , 28. Spray cooling tower, 29. Second fan, 30. Deaerator, 31. Second nitrogen heater, 32. Cooling fan, 33. Nitrogen cooler II, 34. Spray water pump.

Detailed ways

The following non-limiting examples may enable those of ordinary skill in the art to more fully understand the present invention, but do not limit the present invention in any way.

Example 1 The structure of the solid-phase tackifying reactor of one-piece two-component nylon

The structure of the one-piece two-component nylon solid-phase viscosity increasing reactor is composed of the upper preheating section cylinder 1, the middle reaction section cylinder 2 and the lower cooling section cylinder 3, and its structure consists of feeding Port 4, preheating section air outlet 5, inner preheating section cone 6, outer preheating section cone 7, preheating section air inlet ring 8, preheating section distribution cone 9, preheating section air inlet 10, reactor Insulation coil 11, inner layer reaction section cone 12, reaction section distribution cone 13, reaction section air inlet 14, cooling section return air cavity 15, cooling section air outlet 16, cooling section distribution cone 17, cooling section air inlet 18, The cooling section cone 19, the discharge port 20 and the reactor insulation coil 11 are composed; the specific connection relationship is:

The top of the preheating section cylinder 1 is closed, and is provided with a feed port 4 and a preheating section air outlet 5, and the bottom of the preheating section cylinder is provided with two layers of inner and outer preheating section cones 6 and 7, both of which are The ring-shaped, downwardly open inverted cone; the annular conical cavity between the two-layer preheating section cones forms the preheating section air inlet ring 8, and the outer preheating section cone corresponding to the preheating section air inlet ring 8 The body 7 is provided with a preheating section air inlet 10; inside the preheating section cylinder, above the preheating section air inlet ring 8, a preheating section distribution cone 9 is arranged;

The upper part of the reaction section cylinder 2 is open, and the reaction section cylinder 2 is sleeved on the outer preheating section cone 7 through this opening. The reaction section cone 12 is provided with a reaction section air inlet 14; inside the reaction section cylinder 2, above the reaction section air inlet 14, a reaction section distribution cone is arranged 13;

The upper part of the cooling section cylinder 3 is open, the cooling section cylinder 3 is sleeved on the reaction section cone 12 through this opening, and the cavity formed between the cooling section cylinder 3 and the reaction section cone 12 is: The cooling section return air cavity 15; through the opening of the reaction section cone 12, the reaction section cylinder 2 and the cooling section cylinder 3 communicate with each other; the cooling section air outlet 16 is provided on the outer wall of the cooling section return air cavity 15.

The lower structure of the cooling section cylinder 3 is similar to the lower structure of the reaction section cylinder 2; the bottom of the cooling section cylinder 3 is provided with a closed inverted cone cooling section cone 19; in the cooling section cone 19 A cooling section air inlet 18 is arranged on the upper part; inside the cooling section cylinder 3 , above the cooling section air inlet 18 , a cooling section distribution cone 17 is arranged;

The reactor insulation coil 11 is a circular tube structure that is evenly wound and fixed on the outer wall of the preheating section cylinder 1 and the reaction section cylinder 2. According to the length requirements, several more inlets and outlets can be set. The reactor insulation coil 11 Use steam or heat transfer oil as insulation filling medium.

The preheating section distribution cone 9 , the reaction section distribution cone 13 and the cooling section distribution cone 17 are all regular triangular cones with the cone top facing upward, and the cone angle is 60°.

The diameter of the cylinder body 1 in the preheating section is 1.1 times the diameter of the cylinder body 2 in the reaction section; the diameter of the cylinder body 3 in the cooling section is 0.8 times the diameter of the cylinder body 2 in the reaction section;

The opening diameter of the inner layer preheating section cone 6 is 0.7 times the diameter of the preheating section cylinder 1; the opening diameter of the reaction section cone 12 is 0.7 times the diameter of the reaction section cylinder 2;

The diameter of the bottom surface of the preheating section distribution cone 9 is 0.5 times the opening diameter of the preheating section air inlet ring 8, and the height from the opening position of the preheating section air inlet ring 8 is 0.6 times the opening diameter.

The diameter of the bottom surface of the reaction section distribution cone 13 is 0.5 times the opening diameter of the reaction section cone 12 , and the height from the opening position of the reaction section cone 12 is 0.6 times the opening diameter.

The diameter of the bottom surface of the cooling section distribution cone 17 is 0.6 times the diameter of the cooling section cylinder 3, and the height from the cooling section air inlet 18 is about 0.4 times the cooling section cylinder diameter.

Example 2 A system for producing high viscosity nylon chips using an integrated two-component nylon solid-phase tackifying reactor

The system for producing high-viscosity two-component nylon chips by using the above-mentioned one-piece two-component nylon solid-phase viscosity increasing reactor is mainly composed of nitrogen replacement silo 21, feeder 22, discharger 23, The first fan 24, the first nitrogen heater 25, the energy-saving heat exchanger 26, the nitrogen cooler I27, the spray cooling tower 28, the second fan 29, the deaerator 30, the second nitrogen heater 31, the cooling fan 32, Nitrogen cooler II33, spray water pump 34 and other equipment; the specific connection relationship is:

The solid-phase viscosity-increasing reactor of the one-piece two-component nylon is connected with the nitrogen replacement silo 21 via the feeder 22 and the feed port 4;

The air outlet 5 of the preheating section at the top of the preheating section of the solid-phase viscosity increasing reactor of the one-piece two-component nylon is respectively connected with the inlet of the first fan 24 and the inlet of the energy-saving heat exchanger 26, and the air outlet of the first fan 24 The nitrogen heater 25 is connected to the air inlet 10 of the preheating section, the outlet of the energy-saving heat exchanger 26 is connected to the inlet of the nitrogen cooler I27, the outlet of the nitrogen cooler I27 is connected to the inlet of the spray cooling tower 28, and the outlet of the spray cooling tower 28 is connected to the first The inlet of the second fan 29 is connected to the inlet, and the outlet of the second fan 29 is sequentially connected to the air inlet of the reaction section of the energy-saving heat exchanger 26, the deaerator 30, the nitrogen heater 31 and the solid-phase viscosity-increasing reactor of the integrated two-component nylon 14 connected.

A communication pipe is provided between the outlet pipe of the deaerator 30 and the inlet pipe of the cooling fan 32 .

The air outlet 16 of the cooling section of the solid-phase tackifying reactor of the integrated two-component nylon is connected to the cooling fan 32 and the nitrogen cooler II33 in turn, and finally the solid-phase tackifying of the integrated two-component nylon is connected through the air inlet 18 of the cooling section. connected to the reactor.

Example 3 Process flow for producing high viscosity nylon chips using the solid-phase tackifying reactor of the one-piece two-component nylon described above

The low-viscosity nylon chips enter the solid-phase tackifying reactor of the one-piece two-component nylon through the nitrogen replacement silo 21, and are filled into the solid-phase tackifying reactor of the one-piece two-component nylon through the feeder 22 and the feed port 4. In the cylinder body 1 of the preheating section at the upper part of the reactor, the material accumulated in the reactor is controlled by the discharger 22 to gradually fall; the nylon chips with low viscosity are fully contacted with the high temperature reaction nitrogen in the cylinder body 1 of the upper preheating section, and heated. To 130～180 ℃, start to react and increase the viscosity; the nylon chips with low viscosity stay in the reaction section cylinder 2 for ~30 hours and then fall into the cooling section cylinder 3 through the reaction section distribution cone 13; the function of the reaction section distribution cone 13 The slices can fall evenly in the state of plunger flow, and at the same time, the contact between the nitrogen gas and the slices can be more uniform and sufficient; the distribution cone 13 can also effectively prevent the slices from being blocked by arching. The slices that have been reacted and thickened in the reaction section cylinder 2 enter the cooling section cylinder 3, are cooled to below 38°C by the circulating cold nitrogen, and finally pass through the discharge port 20 provided at the bottom of the cooling section cone 19 and discharge The container 23 is finally sent to the storage and packaging section.

In the process of above-mentioned low-viscosity nylon chip reaction thickening, relate to the utilization of reaction cycle nitrogen, the utilization of described reaction cycle nitrogen, process is as follows:

The reactive nitrogen from the air outlet 5 of the preheating section at the top of the preheating section cylinder is divided into two parts. One part is pressurized by the first fan 24 and enters the upper part as direct circulating nitrogen through the nitrogen heater 25 through the air inlet 10 of the preheating section. The cylinder body 1 in the preheating section and the other part are initially cooled by the energy-saving heat exchanger 26 and the nitrogen cooler I27, and then enter the spray cooling tower 28 for cooling and spray cooling to 12-25 ° C, remove excess water to obtain dehumidified nitrogen, and pass through the second fan. After 29 is pressurized, the energy-saving heat exchanger 26, the deaerator 30, and the nitrogen heater 31 pass through the air inlet 14 of the reaction section, and enter the solid-phase viscosity-increasing reactor of the integrated two-component nylon to carry out the solid-phase polycondensation reaction and Cycle again.

In order to ensure that the heating or cooling of the slices by nitrogen is more sufficient and uniform, the ratio of the flow rate of circulating nitrogen gas to the slice flow rate in the preheating section is generally controlled at 3.5 to 6.5.

In order to ensure that the heating or cooling of the slices by nitrogen is more sufficient and uniform, the ratio of the flow rate of the circulating nitrogen used in the reaction section to the flow rate of the slices is generally controlled at 1.5 to 3.0.

In the reaction cycle nitrogen, the ratio of the nitrogen dehumidified by the spray cooling tower 28 to the flow rate of the slices is 1.5 to 3.0; by controlling this ratio, the nitrogen during the reaction and thickening of the slices through the reaction section barrel 2 can be further controlled. The humidity of the finished product can be adjusted within the range of 0.02% to 0.06%.

After being cooled and pressurized by the cooling fan 32 and the nitrogen cooler II33, the nitrogen gas coming out of the cylinder of the cooling section enters the cylinder of the cooling section of the solid-phase viscosity-increasing reactor of the integrated two-component nylon through the air inlet 18 of the cooling section again. The ratio of the flow rate of the cooling circulating nitrogen gas to the flow rate of the slices is generally controlled at 1.2 to 2.5. In this cycle, the humidity of the slices is adjusted by supplementing the high dew point nitrogen after deoxygenation from the spray, so as to adjust the final moisture content of the finished slices within the range of 0.02-0.06%.

Take the high-viscosity two-component nylon slicing device with an annual output of 5,000 tons as an example:

The two-component nylon chips with a viscosity of 2.61 and a water content of about 0.7% are sent to the nitrogen replacement silo 21 for nitrogen replacement by air flow, and enter the solid-phase thickening reactor of the one-piece two-component nylon under the action of the feeder 22, Fill the cylinder body 1 of the upper preheating section and maintain a certain material level; in the cylinder body 1 of the preheating section, the slices are fully contacted with the high-temperature reaction nitrogen gas at 170°C from the air inlet 10 of the preheating section, and the temperature of the slices rises. The water is removed, and the polycondensation reaction is initiated at the same time, and then enters the reaction section cylinder 2; in the reaction section, the slices continue to undergo the polycondensation reaction under the action of fresh nitrogen at the bottom, and the molecular weight and viscosity increase accordingly; the thickened slices directly fall into the one-piece double-pack The cooling section cylinder 3 at the bottom of the nylon-based solid-phase viscosity increasing reactor is humidified to about 500 ppm by supplementing fresh nitrogen slices with a certain humidity in the cooling section cylinder 3, and cooled to below 38 ℃ by the circulating cold nitrogen, The slices are finally sent to the finished product storage or packaging section through the discharger 23 .

The moisture removed by the viscosity-increasing reaction is carried out by the circulating nitrogen from the air outlet 5 of the top preheating section and divided into two paths. The tuyere 10 is circulated for preheating; the other way is used as dehumidifying nitrogen, which is initially cooled by the energy-saving heat exchanger 26 and the nitrogen cooler I27 and then enters the spray cooling tower 28 to be cooled to ~ 20 ° C, removes excess water, and then passes through the second fan 29 After pressurization, it enters the energy-saving heat exchanger 26 in turn, the deaerator 30 removes oxygen, reduces the oxygen content of nitrogen to less than 1 ppm, and then is heated to 170 ℃ by the nitrogen heater 31, and then enters the integrated double group from the air inlet 14 of the reaction section. Separate nylon solid phase viscosifying reactor for recirculation.

The nitrogen from the air outlet 16 of the cooling section is pressurized by the cooling fan 32, and then enters the nitrogen cooler II33 to be cooled to below 35°C, and then enters the solid phase viscosity increasing reactor of the integrated two-component nylon from the air inlet 18 of the cooling section for cooling. segment, loop again.

Compared with the split-type device of the same scale of dryer, reactor and cooler, the utility model saves at least 6m of space in the height of the equipment, can reduce the energy consumption of raw material transportation by about 0.6kw, and save about 4000 yuan per year. ; Reduce the rotary blanking device between the dryer, the reactor and the cooler, which can reduce the overall crushing rate of the finished chips by about 30ppm. In addition, equipment investment and construction investment have been greatly saved.

The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Those skilled in the art can easily think of changes or changes within the technical scope disclosed by the present invention. Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (10)

1. An integrated two-component nylon solid-phase viscosifying reactor, characterized in that: the reactor consists of a preheating section cylinder (1) in the upper part, a reaction section cylinder (2) in the middle and a cooling section cylinder in the lower part. Body (3), feed port (4), air outlet of preheating section (5), inner preheating section cone (6), outer preheating section cone (7), preheating section air inlet ring (8) , preheating section distribution cone (9), preheating section air inlet (10), reaction section cone (12), reaction section distribution cone (13), reaction section air inlet (14), cooling section return air cavity (15) ), cooling section air outlet (16), cooling section distribution cone (17), cooling section air inlet (18), cooling section cone (19), material outlet (20) and reactor insulation coil (11) , and its connection relationship is: The top of the preheating section cylinder (1) is closed, and is provided with a feed inlet (4) and a preheating section air outlet (5), and the bottom of the preheating section cylinder (1) is annular. , downwardly open inverted cone inner layer preheating section cone (6) and outer layer preheating section cone (7); inner layer preheating section cone (6) and outer layer preheating section cone ( The annular conical cavity between 7) forms a preheating section air inlet ring (8), and a preheating section air inlet (10) is provided on the outer layer preheating section cone (7) corresponding to the preheating section air inlet ring (8). ); inside the preheating section cylinder (1), above the preheating section air inlet ring (8), there is a preheating section distribution cone (9); The upper part of the reaction section cylinder (2) is open, the reaction section cylinder (2) is sleeved on the outer layer preheating section cone (7) through this opening, and the bottom of the reaction section cylinder (2) is provided with The reaction section cone (12) is in the form of an annular, downwardly open inverted cone; the reaction section cone (12) is provided with a reaction section air inlet (14); the reaction section cylinder (2) Inside, above the reaction section air inlet (14), a reaction section distribution cone (13) is arranged; The upper part of the cooling section cylinder (3) is open, and the cooling section cylinder (3) is sleeved on the reaction section cone (12) through this opening, and the cooling section cylinder (3) and the reaction section cone The cavity formed between (12) is the cooling section return air cavity (15); through the opening of the reaction section cone (12), the interior of the reaction section cylinder (2) and the cooling section cylinder (3) are communicated ; A cooling section air outlet (16) is provided on the outer wall of the cooling section return air cavity (15); The bottom of the cooling section cylinder (3) is provided with a closed inverted cone cooling section cone (19); the cooling section cone (19) is provided with a cooling section air inlet (18); Inside the cooling section cylinder (3), above the cooling section air inlet (18), a cooling section distribution cone (17) is arranged; a discharge outlet (20) is arranged at the bottom of the cooling section cone (19); The reactor insulation coil (11) is a circular tube structure, which is evenly wound and fixed on the outer walls of the preheating section cylinder (1) and the reaction section cylinder (2), and several inlets and outlets are arranged on the outer walls. 2 . The solid-phase viscosity-increasing reactor of one-piece two-component nylon according to claim 1, characterized in that: steam or heat-conducting oil is used as heat-insulating filling medium in the heat-insulating coil (11) of the reactor, and the The process temperature setting of the reactor insulation coil (11) is consistent with the process temperature of the reaction section cylinder (2). 3. The solid-phase viscosity increasing reactor of one-piece two-component nylon according to claim 1, characterized in that: the preheating section distribution cone (9), the reaction section distribution cone (13) and the cooling section distribution cone (17) All are equilateral triangular cones with the cone top facing upward, and the cone angle is 30~60°. 4. The solid-phase viscosity-increasing reactor of one-piece two-component nylon according to claim 1, characterized in that: the diameter of the cylinder body (1) in the preheating section is 1~1 of the diameter of the cylinder body (2) in the reaction section. 1.2 times; the diameter of the cylinder body (3) in the cooling section is 0.6 to 1 times the diameter of the cylinder body (2) in the reaction section. 5. The solid-phase viscosity increasing reactor of one-piece two-component nylon according to claim 1, characterized in that: the diameter of the opening of the inner layer preheating section cone (6) is the same as that of the preheating section cylinder (1 ) is 0.3 to 0.8 times the diameter of the reaction section cone (12); the opening diameter of the reaction section cone (12) is 0.3 to 0.8 times the diameter of the reaction section cylinder (2). 6. The solid-phase viscosity-increasing reactor of an integrated two-component nylon according to claim 1, characterized in that: the diameter of the bottom surface of the distribution cone (9) in the preheating section is 0.5 ~ 0.5~ of the opening diameter of the air inlet ring (8) in the preheating section. 1.2 times, the height from the opening of the air inlet ring (8) in the preheating section is about 0.2 to 1.5 times the diameter of the opening. 7 . The solid-phase thickening reactor for one-piece two-component nylon according to claim 1 , wherein the diameter of the bottom surface of the distribution cone ( 13 ) in the reaction section is 0.5 to 0.7 times the diameter of the cylinder body ( 2 ) in the reaction section. 8 . , the height of the bottom surface from the reaction section cylinder (2) is about 0.2 to 0.5 times the diameter of the bottom surface of the distribution cone. 8. The solid-phase viscosity-increasing reactor of one-piece two-component nylon according to claim 1, characterized in that: the diameter of the bottom surface of the distribution cone (17) in the cooling section is 0.5 to 0.5 of the diameter of the cylinder (3) in the cooling section. 0.7 times, the height of the bottom surface from the reaction section cylinder (2) is about 0.2 to 0.5 times the diameter of the bottom surface of the distribution cone. 9. An integrated two-component nylon solid-phase tackifying reaction system, characterized in that: its structure comprises the one-piece two-component nylon solid-phase tackifying reactor of claim 1, and a first fan (24) , the first nitrogen heater (25), energy-saving heat exchanger (26), nitrogen cooler I (27), spray cooling tower (28), spray water pump (34), second fan (29), deaerator device (30), second nitrogen heater (31), cooling fan (32), nitrogen cooler II (33); the connection relationship is: The air outlet (5) at the top of the preheating section cylinder (1) of the one-piece two-component nylon solid-phase viscosity increasing reactor is respectively connected with the first fan (24) and the energy-saving heat exchanger (26), so The air outlet of the first fan (24) is connected to the air inlet (10) of the preheating section; the energy-saving heat exchanger (26) is connected to the nitrogen cooler I (27) and the spray cooling tower (28) in turn, and the spray The shower cooling tower (28) is connected to the second fan (29), and the air outlet of the second fan (29) is sequentially connected to the energy-saving heat exchanger (26), the deaerator (30), and the second nitrogen heater (31) After being connected, it is connected with the air inlet (14) of the reaction section of the solid-phase tackifying reactor of the one-piece two-component nylon; A three-way pipeline is arranged on the pipeline between the deaerator (30) and the second nitrogen heater (31). The pipeline is not only connected to the air outlet (16) of the cooling section, but also connected to the cooling fan (32), the nitrogen cooler II (33) is connected to the air inlet (18) of the cooling section of the solid-phase viscosity increasing reactor of the one-piece two-component nylon after being connected. 10. The system according to claim 9, characterized in that: the spray cooling tower (28) is equipped with a spray water pump (34) as a water circulation power.

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