CN216871093U

CN216871093U - Xanthation reaction process temperature regulating system

Info

Publication number: CN216871093U
Application number: CN202123331046.6U
Authority: CN
Inventors: 李殿洪; 李元江; 胡润; 毛述芳; 黄龙彬; 张治国
Original assignee: Yibin Grace Group Co Ltd
Current assignee: Yibin Grace Group Co Ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-07-01
Anticipated expiration: 2031-12-28

Abstract

The utility model discloses a temperature regulating system for a yellowing reaction process, which belongs to the technical field of viscose staple fiber production and comprises at least one heat exchanger, a storage tank and a yellowing machine, wherein a heat-insulating jacket is arranged on the outer side of the yellowing machine, a cold water outlet of the heat exchanger is connected with a water inlet of the storage tank through a pipeline I, a water outlet of the storage tank is communicated with the water inlet I of the heat-insulating jacket through a pipeline II, a water outlet I of the heat-insulating jacket is communicated with the water inlet through a pipeline III, and the water outlet I is communicated with a hot water inlet of the heat exchanger through a pipeline IV, so that the problems that the yellowing temperature regulating system in the prior art consumes a large amount of water and the energy consumption is large in the production process are solved; there is a problem of waste of cold/heat.

Description

Xanthation reaction process temperature regulating system

Technical Field

The utility model belongs to the technical field of viscose staple fiber production, and particularly relates to a temperature regulating system in a yellowing reaction process.

Background

In the yellowing reaction process of viscose production, the yellowing reaction is a reversible reaction, both the positive reaction and the reverse reaction have a great relationship with temperature, and because the yellowing reaction is an exothermic reaction, the temperature can be gradually increased along with the yellowing reaction, the speed of the reverse reaction is increased after the temperature is increased in the whole reaction process, and the yellowing reaction balance can also move towards the direction of reducing the esterification degree; along with the temperature rise, the side reactions of the yellowing reaction are increased gradually, a large amount of carbon disulfide is consumed by the side reactions, the stability of the viscose is reduced, and hydrogen sulfide and carbon disulfide gas are separated out from side reaction products to pollute the environment, so that the yellowing temperature needs to be controlled within a certain range in production to ensure that the reaction is carried out towards an expected direction.

The national intellectual property office discloses an invention patent with the application number of "CN 202010929317.9" on 7/9/2021, the name of the utility model is "a yellowing temperature regulating system for viscose fiber production", and discloses a yellowing temperature regulating system for viscose fiber production, which comprises a controller and two yellowing machines, wherein each yellowing machine is connected with a regulating system, the regulating system comprises a temperature regulating water bucket, a water delivery pump and a heat exchanger, the regulating system also comprises a frequency converter, the frequency converter is used for controlling the flow of the water delivery pump, the top of the temperature regulating water bucket is provided with a soft water inlet pipe and a steam inlet pipe, the bottom of the temperature regulating water bucket is connected with the water delivery pump through a first connecting pipe, the heat exchanger is provided with a hot water inlet, a hot water outlet, a chilled water inlet and a chilled water outlet, the outlet of the water delivery pump is connected with the hot water inlet through a second connecting pipe, the hot water outlet is connected with the xanthating machine through a third connecting pipe, the top of the xanthating machine is also connected with the temperature-adjusting water bucket through a return pipe, the return pipe extends into the temperature-adjusting water bucket, the third connecting pipe is connected with the return pipe through a circulating pipe, the third connecting pipes of the two adjusting systems are connected through a first bypass pipe, and the return pipes of the two adjusting systems are connected through a second bypass pipe; the soft water advances to be equipped with first valve and first solenoid valve on managing, steam advances to manage and is equipped with second valve and second solenoid valve, be equipped with first temperature sensor and level sensor on the cask that adjusts the temperature, be equipped with second temperature sensor on the third connecting pipe, be equipped with third temperature sensor on the xanthation machine, two on the xanthation machine third temperature sensor with controller electric connection, and two among the governing system first solenoid valve, second solenoid valve the converter first temperature sensor level sensor with second temperature sensor all with controller electric connection. The common temperature regulating system in the existing viscose production is provided, and the following defects exist in the use process of the temperature regulating system: a large amount of water is consumed, and the energy consumption in the production process is large; there is a waste of cold/heat.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems that a yellowing temperature regulating system for viscose fiber production in the prior art consumes a large amount of water and energy consumption is large in the production process; the problem of cold/heat waste exists, and a novel temperature regulating system for the yellowing reaction process is provided.

In order to achieve the above object, the technical solution of the present invention is as follows:

a temperature regulating system for a yellowing reaction process comprises at least one heat exchanger, a storage tank and a yellowing machine, wherein a heat-insulating jacket is arranged on the outer side of the yellowing machine, a cold water outlet of the heat exchanger is connected with a water inlet of the storage tank through a pipeline I, a water outlet of the storage tank is communicated with the water inlet I of the heat-insulating jacket through a pipeline II, a water outlet I of the heat-insulating jacket is communicated with the water inlet through a pipeline III, and the water outlet I is communicated with a hot water inlet of the heat exchanger through a pipeline IV.

Further, the heat exchanger is a heat exchanger of an alkali station in viscose production.

Furthermore, a liquid level meter is further arranged on the storage tank, and a drainage pipeline is connected to the storage tank.

Furthermore, a pump and a pressure gauge are arranged on the pipeline II, and the pump is in control connection with the pressure gauge.

Furthermore, an electromagnetic valve I is further arranged on the pipeline II, a temperature sensor I is arranged on the xanthating machine, a temperature sensor II is arranged on a heat-insulating jacket of the xanthating machine, and the electromagnetic valve I is in control connection with the temperature sensor I and the temperature sensor II.

Further, the heat exchanger still includes import A and export A, is equipped with temperature sensor III on the pipeline of import A connection, is equipped with temperature sensor IV on the pipeline of export A connection, be equipped with solenoid valve II on the pipeline III, be equipped with solenoid valve III on the pipeline IV, solenoid valve III and temperature sensor III control connection, solenoid valve II and temperature sensor III, temperature sensor IV control connection.

Further, still include heat exchanger II, heat exchanger II and heat exchanger series, heat exchanger II includes import B and export B, import B and export A intercommunication.

The utility model has the beneficial effects that:

according to the utility model, the system can be used for solving the problems that a yellowing temperature regulating system for producing viscose staple fibers in the prior art consumes a large amount of water and energy consumption is large in the production process; the problem of cold/heat waste exists, the temperature adjustment unevenness in the yellowing reaction process can be obviously improved, and the problems that one storage tank corresponds to a plurality of yellowing machines to cause cold waste and energy consumption is high are solved.

In the utility model, the heat exchanger is a heat exchanger of an alkali station in viscose production, and the cold energy exchanged by the heat exchanger in the alkali station can be efficiently utilized.

Thirdly, the storage tank is further provided with a liquid level meter, the liquid level meter is used for detecting the liquid level in the storage tank, and when the liquid level meter displays that the liquid level in the storage tank exceeds the expectation, water in the storage tank is discharged from a drainage pipeline.

And fourthly, in the utility model, a pump and a pressure gauge are arranged on the pipeline II, the pressure gauge is used for displaying the pressure of the pipeline where the pump is located, the pump is in control connection with the pressure gauge, and when the pressure value displayed by the pressure gauge exceeds an expected value, the start and stop or the opening degree of the pump are adjusted.

In the utility model, the pipeline II is also provided with an electromagnetic valve I, the xanthating machine is provided with a temperature sensor I, the heat-insulating jacket of the xanthating machine is provided with a temperature sensor II, the electromagnetic valve I is in control connection with the temperature sensor I and the temperature sensor II, and the electromagnetic valve I is interlocked with the temperature in the xanthating machine and the temperature difference in the jacket, so that the system can ensure that the temperature in the xanthating machine is within an expected temperature range, ensure the quality of the xanthation reaction, reduce the occurrence of side reactions and further improve the stability of the viscose.

Sixthly, the design of the temperature sensor III and the temperature sensor IV and the association with the electromagnetic valve II and the electromagnetic valve III realize the quick and accurate adjustment of the valves on each pipeline, ensure the temperature of the water body within a controllable range and ensure the normal and stable operation of production.

Seventhly, in the utility model, two-stage heating is mainly performed in a ripening working section in the production of viscose staple fibers, the two-stage heating mainly comprises a heat exchanger and a heat exchanger I, the heat exchanger II is connected with the heat exchanger in series, the heat exchanger II comprises an inlet B and an outlet B, the inlet B is communicated with the outlet A, namely, the cold energy exchanged after the two-stage heating is used for cooling/heat preservation of a xanthating machine in a xanthating procedure, the energy is efficiently utilized, and the aim of saving the production cost is fulfilled.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of another embodiment.

Fig. 3 is a schematic structural diagram of yet another embodiment.

Wherein, 1, a heat exchanger; 2. a storage tank; 3. a yellowing machine; 4. a heat-preserving jacket; 5. a cold water outlet; 6. a water inlet; 7. a pipeline I; 8. a water outlet; 9. a water inlet I; 10. a pipe II; 11. a water outlet I; 12. a conduit III; 13. a hot water inlet; 14. a pipeline IV; 15. a liquid level meter; 16. a water discharge pipeline; 17. a pump; 18. a pressure gauge; 19. a solenoid valve I; 20. a temperature sensor I; 21. a temperature sensor II; 22. an inlet A; 23. an outlet A; 24. a solenoid valve II; 25. a temperature sensor III; 26. a temperature sensor IV; 27. a solenoid valve III; 28. a heat exchanger II; 29. an inlet B; 30. an outlet B; 31. a hot water inlet I; 32. an electromagnetic valve IV; 33. a cold water outlet I; 34. a pipeline V; 35. and a pipeline VI.

Detailed Description

The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.

Example 1

The utility model provides a etiolation reaction process temperature regulating system, belongs to viscose fiber production technical field, including a heat exchanger 1 to and storage tank 2 and etiolation machine 3, the 3 outsides of etiolation machine are equipped with heat preservation jacket 4, refer to figure 1, the cold water outlet 5 of heat exchanger 1 is connected through pipeline I7 with the water inlet 6 of storage tank 2, and the delivery port 8 of storage tank 2 and the water inlet I9 of heat preservation jacket 4 pass through pipeline II10 intercommunication, and the delivery port I11 and the water inlet 6 of heat preservation jacket 4 pass through pipeline III12 intercommunication, and delivery port I11 passes through pipeline IV14 intercommunication with the hot water inlet 13 of heat exchanger 1.

In this embodiment, the ripening process needs heating in the viscose production, and the etiolation process needs the cooling, consequently considers linking the temperature regulating system of two processes, reaches the temperature regulating system's of two processes demand, reduces the energy consumption simultaneously, reaches the purpose of high-efficient utilization energy. The yellowing machine 3 achieves the cooling/heat preservation process of the yellowing machine 3 by stabilizing the water temperature in the heat preservation jacket 4, the heated water in the heat preservation jacket 4 is conveyed to the heat exchanger 1 for heat exchange through a pipeline IV14, the cooled water is conveyed into the storage tank 2 from the cold water outlet 5, meanwhile, the storage tank 2 can directly receive the heated hot water (namely a pipeline III) from the heat preservation jacket 4 of the yellowing machine 3, the water in the storage tank 2 is ensured to be in the expected temperature range, and the water in the storage tank 2 is supplied to each yellowing machine 3 for cooling/heat preservation; in addition, the heat exchanged by the heat exchanger 1 is supplied to each stage of heating process in viscose production for use.

Preferably, the heat exchanger 1 is a heat exchanger 1 of an alkali station in a mixing and defoaming process in a curing process in viscose production.

Example 2

This embodiment is a further optimization of embodiment 1, and referring to fig. 2, the storage tank 2 is further provided with a liquid level meter 15, the storage tank 2 is connected with a water drainage pipeline 16, and when the water in the storage tank 2 reaches a preset liquid level, the water drainage pipeline 16 is used for draining part of water, so as to ensure the normal operation of the system.

Example 3

This embodiment is different from embodiment 1-2 in that, referring to fig. 2, a pump 17 and a pressure gauge 18 are provided on the pipe II10, and the pump 17 is in control connection with the pressure gauge 18.

Example 4

Compared with the embodiments 1-3, the difference of this embodiment is that, referring to fig. 2, the pipeline II10 is further provided with an electromagnetic valve I19, the xanthating machine 3 is provided with a temperature sensor I20, the heat-insulating jacket 4 of the xanthating machine 3 is provided with a temperature sensor II21, and the electromagnetic valve I19 is in control connection with the temperature sensor I20 and the temperature sensor II 21.

Preferably, the heat exchanger 1 further includes an inlet a22 and an outlet a23, a temperature sensor III25 is arranged on a pipeline connected to the inlet a22, a temperature sensor IV26 is arranged on a pipeline connected to the outlet a23, an electromagnetic valve II24 is arranged on the pipeline III12, an electromagnetic valve III27 is arranged on the pipeline IV14, an electromagnetic valve III27 is in control connection with a temperature sensor III25, and an electromagnetic valve II24 is in control connection with the temperature sensor III25 and the temperature sensor IV 26.

Example 5

This embodiment is different from embodiments 1-4 in that, referring to fig. 3, it further includes a heat exchanger II28, a heat exchanger II28 is connected in series with the heat exchanger 1, a heat exchanger II28 includes an inlet B29 and an outlet B30, and an inlet B29 is communicated with the outlet a 23.

Example 6

This embodiment will be described by taking a cooling/heat-preserving system of twice heating and yellowing processes in a ripening process of a viscose staple fiber production line of this company as an example. By total, the system can save about 60 ten thousand KJ of heat energy in one year of operation, save about 4000 tons of soft water and stably operate.

Specifically, a xanthation reaction process temperature regulating system belongs to viscose fiber production technical field, including heat exchanger 1, heat exchanger 1I, storage tank 2 and xanthation machine 3. The heat exchanger 1 is used for primary heating of the ripening section, and the heat exchanger 1I is used for secondary heating of the ripening section. The heat exchanger 1 comprises an inlet A22 and an outlet A23, the heat exchanger 1I comprises an inlet B29 and an outlet B30, the outlet A23 is connected with an inlet B29, and water heated by the heat exchanger 1 and the heat exchanger 1I is used for primary heating and secondary heating of a ripening working section.

The external side of the xanthating machine 3 is provided with a heat-insulating jacket 4, a cold water outlet 5 of the heat exchanger 1 is connected with a water inlet 6 of the storage tank 2 through a pipeline I7, a water outlet 8 of the storage tank 2 is communicated with a water inlet I9 of the heat-insulating jacket 4 through a pipeline II10, a water outlet I11 of the heat-insulating jacket 4 is communicated with the water inlet 6 through a pipeline III12, and a water outlet I11 is communicated with a hot water inlet 13 of the heat exchanger 1 through a pipeline IV 14.

Furthermore, a liquid level meter 15 is further disposed on the storage tank 2 for detecting the water level in the storage tank 2, and a drainage pipe 16 is connected to the storage tank 2 for draining the excess water in the storage tank 2.

Preferably, the pipeline II10 is provided with a pump 17 and a pressure gauge 18, the pump 17 is in control connection with the pressure gauge 18, and a worker can adjust the start and stop or the rotating speed of the pump 17 according to the pipeline pressure displayed by the pressure gauge 18.

Furthermore, the pipeline II10 is further provided with an electromagnetic valve I19, the xanthating machine 3 is provided with a temperature sensor I20, the heat-insulating jacket 4 of the xanthating machine 3 is provided with a temperature sensor II21, and the electromagnetic valve I19 is in control connection with the temperature sensor I20 and the temperature sensor II 21. The opening degree of the solenoid valve I19 can be adjusted according to the temperature difference measured by the temperature sensor I20 and the temperature sensor II21, so that the temperature in the xanthating machine 3 and the water temperature in the jacket are judged to be in the expected range.

Furthermore, the heat exchanger 1 further comprises an inlet a22 and an outlet a23, a temperature sensor III25 is arranged on a pipeline connected to the inlet a22, a temperature sensor IV26 is arranged on a pipeline connected to the outlet a23, an electromagnetic valve II24 is arranged on the pipeline III12, an electromagnetic valve III27 is arranged on the pipeline IV14, an electromagnetic valve III27 is in control connection with a temperature sensor III25, and an electromagnetic valve II24 is in control connection with the temperature sensor III25 and the temperature sensor IV 26.

Furthermore, the water outlet I11 is connected with the heat exchanger 1I through a pipeline V34, a valve IV is arranged on the pipeline V34, the heat exchanger 1I is communicated with the water inlet 6 through a pipeline VI35, the valve IV is connected with a temperature sensor IV26 in a control mode, the electromagnetic valve II24 is connected with the temperature sensor III25 and the temperature sensor IV26 in a control mode, and the opening degree of the electromagnetic valve II24 is adjusted according to the temperature difference of the water temperature in the pipeline where the temperature sensor III25 and the temperature sensor IV26 are located. The whole temperature regulating system is reliable and runs stably.

In practical application, all the temperature sensors I20, II21, III25, IV26, I19, II24, III27 and IV32 can be connected with a master controller to realize full-automatic control.

Claims

1. A yellowing reaction process temperature regulating system is characterized in that: the device comprises at least one heat exchanger (1), a storage tank (2) and a xanthating machine (3), wherein a heat-insulating jacket (4) is arranged on the outer side of the xanthating machine (3), a cold water outlet (5) of the heat exchanger (1) is connected with a water inlet (6) of the storage tank (2) through a pipeline I (7), a water outlet (8) of the storage tank (2) is communicated with a water inlet I (9) of the heat-insulating jacket (4) through a pipeline II (10), a water outlet I (11) of the heat-insulating jacket (4) is communicated with the water inlet (6) through a pipeline III (12), and the water outlet I (11) is communicated with a hot water inlet (13) of the heat exchanger (1) through a pipeline IV (14).

2. The yellowing reaction process temperature regulating system of claim 1, wherein: the heat exchanger (1) is a heat exchanger (1) of an alkali station in viscose production.

3. The yellowing reaction process temperature regulating system according to claim 2, wherein: the storage tank (2) is also provided with a liquid level meter (15), and the storage tank (2) is connected with a drainage pipeline (16).

4. The yellowing reaction process temperature regulating system according to claim 3, wherein: be equipped with pump (17) and pressure gauge (18) on pipeline II (10), pump (17) and pressure gauge (18) control connection.

5. The yellowing reaction process temperature regulating system of claim 4, wherein: the pipeline II (10) is further provided with an electromagnetic valve I (19), the xanthating machine (3) is provided with a temperature sensor I (20), the heat-preservation jacket (4) of the xanthating machine (3) is provided with a temperature sensor II (21), and the electromagnetic valve I (19) is in control connection with the temperature sensor I (20) and the temperature sensor II (21).

6. The yellowing reaction process temperature regulating system according to claim 5, wherein: the heat exchanger (1) further comprises an inlet A (22) and an outlet A (23), a temperature sensor III (25) is arranged on a pipeline connected with the inlet A (22), a temperature sensor IV (26) is arranged on a pipeline connected with the outlet A (23), an electromagnetic valve II (24) is arranged on the pipeline III (12), an electromagnetic valve III (27) is arranged on the pipeline IV (14), the electromagnetic valve III (27) is in control connection with the temperature sensor III (25), and the electromagnetic valve II (24) is in control connection with the temperature sensor III (25) and the temperature sensor IV (26).

7. The yellowing reaction process tempering system according to any one of claims 1 to 6, wherein: still include heat exchanger II (28), heat exchanger II (28) and heat exchanger (1) are established ties, and heat exchanger II (28) are including import B (29) and export B (30), import B (29) and export A (23) intercommunication.