CN220633011U - Central circulation pipe evaporator heating evaporation system - Google Patents

Abstract

The utility model discloses a heating evaporation system of a central circulation pipe evaporator, and belongs to the field of evaporator equipment. The utility model comprises a preheater, a desolventizing tower, a central circulating pipe evaporator, a condenser and a water separator, wherein a discharge hole of the preheater is connected with a primary water washing feed hole of the desolventizing tower, a liquid distribution plate is arranged in the desolventizing tower, the lower end of the desolventizing tower is sequentially connected with an evaporation separator and the central circulating pipe evaporator, the discharge hole of the desolventizing tower is communicated with the condenser through a lift pipe of the desolventizing tower, a liquid phase outlet of the condenser is communicated with a liquid phase inlet of the water separator, a water phase outlet of the water separator is communicated with a water phase collecting tank, and tail gas outlets of the condenser and the water separator are respectively communicated with a tail gas collecting tank. The utility model is beneficial to improving the evaporation rate of materials and reducing the energy consumption.

Description

Central circulation pipe evaporator heating evaporation system

Technical Field

The utility model relates to the technical field of evaporator equipment, in particular to a central circulation pipe evaporator heating evaporation system.

Background

Heat exchangers, which are devices that transfer part of the heat of a hot fluid to a cold fluid, are common devices in chemical, petroleum, power, food and many other industries, and play an important role in production. The heat exchanger can be used as a heater, a cooler, a condenser, an evaporator, a reboiler and the like in chemical production, and has wide application. At present, the common heat exchange evaporation equipment has small evaporation capacity, and the time required for the solution to reach the boiling point of the solution after entering the evaporator is long, so that the working table of an evaporation system device is increased, and meanwhile, the energy consumption is increased. It is of practical importance how to flexibly adjust the heat exchanger system according to the processing requirements to increase the evaporation efficiency.

Through retrieving, the patent application of application number 2018109021887 discloses an evaporator and a heat exchange system comprising the evaporator, wherein a separator is arranged in the evaporator to separate liquid state refrigerant, so that the liquid state refrigerant exchanges heat in the evaporator, and therefore, the liquid state refrigerant can be uniformly distributed, and the heat exchange effect of the evaporator is improved.

The patent application 2018108993824 discloses a high-concentration wastewater circulating heat exchange multi-effect evaporation system and an evaporation process thereof, wherein low-temperature stock solution is pumped into a submerged combustion evaporator, flammable gas is directly sprayed into the evaporator after being ignited, so that the temperature of liquid in the evaporator is increased, generated steam enters a heat preservation gas collection tank, and enters a high-efficiency heat exchanger after being mixed with an idle steam heat source in the heat preservation gas collection tank; the low-temperature stock solution in the feeding barrel enters the high-efficiency heat exchanger, exchanges heat with the high-temperature steam therein and returns to the feeding barrel, and the steam in the high-efficiency heat exchanger is recycled into the heat-preservation gas collection tank. The design reduces the fuel gas amount by more than 60% through the secondary utilization of the heat source and the cyclic heat exchange. In summary, there is a great deal of attention in the current industry to the efficiency and energy consumption of the evaporative heat exchange system, and various improved designs are made, and new optimization ideas and layout designs are also continuously presented.

Disclosure of Invention

1. Technical problem to be solved by the utility model

Aiming at the problems of higher heating energy consumption, overlong evaporation stage time and the like of the traditional heat exchange evaporation system device, the utility model aims to provide a central circulation pipe evaporator heating evaporation system, which comprises a central circulation pipe evaporator, a desolventizing tower, a liquid distribution plate arranged at a feed inlet of the desolventizing tower, and a solution uniformly enters the central circulation pipe evaporator, wherein the solution is subjected to heating evaporation, vaporization and separation, then enters a condenser for cooling and liquefying, a small amount of oil phase solution is contained in the liquefied solution, and the liquefied solution enters the central circulation pipe evaporator again for evaporation after oil-water separation by a water separator, so that the water phase and the oil phase in the solution are thoroughly separated; the central circulation pipe evaporator is used for continuously heating and evaporating, so that the evaporation rate of materials is improved, and the energy consumption is reduced.

2. Technical proposal

In order to achieve the above purpose, the technical scheme provided by the utility model is as follows:

the utility model relates to a central circulation pipe evaporator heating evaporation system which comprises a preheater, a desolventizing tower, a central circulation pipe evaporator, a condenser and a water separator, wherein a discharge hole of the preheater is connected with a primary water washing feed hole of the desolventizing tower, a liquid distribution plate is arranged in the desolventizing tower, the lower end of the desolventizing tower is sequentially connected with an evaporation separator and the central circulation pipe evaporator, the discharge hole of the desolventizing tower is communicated with the condenser through a lift pipe of the desolventizing tower, a liquid phase outlet of the condenser is communicated with a liquid phase inlet of the water separator, a water phase outlet of the water separator is communicated with a water phase collecting tank, and tail gas outlets of the condenser and the water separator are respectively communicated with a tail gas collecting tank.

Further, the condenser comprises a first-stage condenser and a second-stage condenser which are sequentially arranged, a riser of the desolventizing tower is communicated with a feed inlet of the first-stage condenser, a discharge outlet of the first-stage condenser is communicated with a feed inlet of the second-stage condenser, and a liquid outlet of the first-stage condenser and a liquid outlet of the second-stage condenser are both communicated to the water separator; the condenser tail gas discharge port of the secondary condenser is communicated to the tail gas collecting tank.

Furthermore, the lower part of the water separator is provided with a liquid phase inlet of the water separator, and a liquid phase outlet of the primary condenser and a liquid phase outlet of the secondary condenser are connected in parallel through pipelines and then are communicated to the water separator through the liquid phase inlet of the water separator.

Further, the bottom of the water separator is provided with a water separator water phase outlet which is communicated with the water phase collecting tank, the top of the water separator is provided with a water separator tail gas discharge port which is communicated with the tail gas collecting tank.

Furthermore, the upper part of the water separator is also provided with an oil phase outlet of the water separator, the upper part of the desolventizing tower is provided with a secondary washing oil phase feeding port, and the oil phase outlet of the water separator is communicated with the upper part of the desolventizing tower through the secondary washing oil phase feeding port.

Still further, the first-stage condenser feed inlet sets up in the top of first-stage condenser, and first-stage condenser discharge gate sets up in the lower part of first-stage condenser, and the first-stage condenser produces liquid phase export and sets up in the bottom of first-stage condenser.

Further, the feed inlet of the secondary condenser is arranged at the top of the secondary condenser, the liquid phase outlet of the secondary condenser is arranged at the bottom of the secondary condenser, and the tail gas discharge outlet of the condenser is arranged at the lower part of the secondary condenser.

Further, a steam inlet is arranged at the upper part of the side edge of the central circulation pipe evaporator, liquefied steam is discharged through a steam drain pipe at the lower part of the central circulation pipe evaporator, and a steam drain valve and a standby drain valve are connected in parallel on the steam drain pipe.

Further, the evaporation separator at the bottom of the desolventizing tower is connected with the top of the evaporator of the central circulating pipe in a matched and installed manner through a flange.

Further, a central circulating pipe and a heating pipe which is circumferentially arranged on the outer side of the central circulating pipe are arranged in the central circulating pipe evaporator, and the pipe diameter of the central circulating pipe is larger than that of the heating pipe.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:

(1) The central circulation pipe evaporator heating evaporation system is matched with the preheater, the preheated solution enters the desolventizing tower after reaching a certain temperature, the preheated solution is heated uniformly and stably, the conduction stability is ensured, and the evaporation and evaporation separation speed is accelerated after the preheated solution enters the central circulation pipe evaporator for evaporation, so that the production bench time is shortened; and the liquid distribution plate is arranged at the feed inlet of the desolventizing tower, so that liquid uniformly flows into the central circulation pipe to evaporate, heat transfer is improved, the desolventizing tower transfers low-boiling-point substances in the liquid phase into the gas phase, and high-boiling-point substances in the gas phase are transferred into the liquid phase, thereby realizing gas-liquid separation, extracting water phase products and improving product quality.

(2) The central circulation pipe evaporator heating evaporation system is provided with a first-stage condenser and a second-stage condenser, wherein the solution after the first-stage condenser is subjected to cooling liquefaction through circulating water enters a water separator, the non-liquefied gas enters the second-stage condenser and is subjected to cooling through second-stage condensation after being further liquefied through a refrigerant, the non-liquefied gas enters the water separator and is subjected to cooling condensation through the condenser, the gas phase is completely liquefied and enters the water separator, and the tail gas is collected and treated in a concentrated mode, so that environmental pollution is avoided.

(3) The heating evaporation system of the central circulation pipe evaporator comprises a heating chamber of the central circulation pipe evaporator, wherein the heating chamber of the central circulation pipe evaporator consists of a vertical pipe bundle, and the center of the pipe bundle is provided with a central circulation pipe; the heating pipes are distributed around the central circulating pipe, the heating area of the heating pipes per unit volume of the solution is larger than that of the central circulating pipe, the heating is good, the solution is vaporized quickly, the solution descends along the central circulating pipe and ascends along the heating pipe to circularly evaporate the solution, the solution evaporation speed is accelerated, and the energy utilization rate is improved.

(4) According to the central circulation pipe evaporator heating evaporation system, the upper part of the water separator is also provided with the oil phase outlet of the water separator, the upper part of the desolventizing tower is provided with the secondary water washing oil phase feeding port, the oil phase outlet of the water separator is communicated with the upper part of the desolventizing tower through the secondary water washing oil phase feeding port, and the separated oil phase enters the desolventizing tower again for secondary evaporation, so that a continuous liquid-liquid separation process is realized, the liquid phase containing the oil phase in the water phase is reduced to the minimum, the total evaporation separation of the water phase and the oil phase in the solution is ensured, a higher water phase product is produced, and the product quality and the production efficiency are improved.

Drawings

FIG. 1 is a schematic diagram of a heating evaporation system of a central circulation tube evaporator according to the present utility model.

Reference numerals in the schematic drawings illustrate:

1. a preheater; 11. a feed inlet of the preheater; 12. a discharge port of the preheater;

2. a desolventizing tower; 21. a primary water washing feed inlet; 22. a liquid distribution plate; 23. an evaporation separator; 24. a discharge hole of the desolventizing tower; 25. a secondary water washing oil phase feeding port; 26. a stripping tower riser;

3. a central circulation tube evaporator; 31. a central circulation tube; 32. heating pipes; 33. a steam inlet; 34. a steam drain pipe; 35. a remaining unvaporised liquid material outlet;

4. a first-stage condenser; 41. a first-stage condenser feed inlet; 42. a first-stage condenser discharge port; 43. a liquid phase outlet of the first-stage condenser;

5. a second-stage condenser; 51. a feed inlet of the secondary condenser; 52. a liquid phase outlet of the secondary condenser; 53. a condenser tail gas discharge port;

6. a water separator; 61. a water knockout drum tail gas discharge port; 62. a liquid phase inlet of the water knockout drum; 63. a water phase outlet of the water knockout drum; 64. an oil phase outlet of the water separator;

7. a water phase collection tank;

8. a tail gas collection tank.

Detailed Description

For a further understanding of the present utility model, the present utility model will be described in detail with reference to the drawings.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The utility model is further described below with reference to examples.

Example 1

Referring to fig. 1, a heating evaporation system of a central circulation tube evaporator of the present embodiment includes a preheater 1, a desolventizing tower 2, a central circulation tube evaporator 3, a condenser, a water separator 6, a water phase collecting tank 7 and a tail gas collecting tank 8, a preheater discharge port 12 is connected with a primary water washing feed port 21 of the desolventizing tower 2, a liquid distribution plate 22 is disposed at the feed port of the desolventizing tower 2, an evaporation separator 23 and the central circulation tube evaporator 3 are sequentially connected to the lower end of the desolventizing tower 2, a desolventizing tower discharge port 24 is communicated with the condenser through a desolventizing tower riser 26, a liquid phase outlet of the condenser is communicated with a water separator liquid phase inlet 62, a water separator water phase outlet 63 is communicated with the water phase collecting tank 7, and tail gas outlets of the condenser and the water separator 6 are respectively communicated with the tail gas collecting tank 8.

Specifically, the preheater 1 is arranged at the front end of the feed inlet of the desolventizing tower 2, and the two ends of the preheater 1 are respectively provided with a preheater feed inlet 11 and a preheater discharge outlet 12; the discharge port 12 of the preheater is communicated with a primary water washing feed port 21 of the desolventizing tower 2 through a pipeline, and a liquid distribution plate 22 is arranged in the desolventizing tower 2 and used for uniformly distributing liquid to flow into the central circulation pipe evaporator 3 for evaporation, so that the heat transfer efficiency is improved. The desolventizing tower 2 transfers low-boiling-point substances in the liquid phase into the gas phase, and transfers high-boiling-point substances in the gas phase into the liquid phase, so that gas-liquid separation is realized, water phase products are extracted, and the product quality is improved. The bottom of the desolventizing tower 2 is provided with an evaporation separator 23, and the bottom of the evaporation separator 23 is connected with the top of the central circulation pipe evaporator 3 through flange fit; the heating chamber in the central circulation tube evaporator 3 is composed of a vertical tube bundle, and is specifically provided with a central circulation tube 31 and a heating tube 32 circumferentially surrounding the outside of the central circulation tube 31, the tube diameter of the central circulation tube 31 being larger than that of the heating tube 32. The heating area of the heating pipe 32 per unit volume of the solution is larger than that of the central circulating pipe 31, the heating is good, the solution vaporization speed is high, the density difference is generated, so that the solution descends along the central circulating pipe 31 and ascends along the heating pipe 32 to circularly evaporate the solution, the solution evaporation speed is accelerated, and the energy utilization rate is improved. The bottom of the central circulation tube evaporator 3 is provided with a residual non-evaporated liquid material outlet 35; a steam inlet 33 is arranged at the upper part of the side edge of the central circulation pipe evaporator 3, and a steam inlet pipe is externally connected with a steam pipe network and is used for introducing high-temperature steam to evaporate the internal liquid at high temperature; the steam inlet pipe is communicated with the steam drain pipe 34 through a shell side, liquefied steam is timely discharged through the steam drain pipe 34 at the lower part of the central circulation pipe evaporator 3, and the steam drain pipe 34 is connected with a steam drain valve and a standby drain valve in parallel.

In the embodiment, the solution is preheated by the preheater 1, and enters the desolventizing tower 2 after reaching a certain temperature, and the preheated solution is heated uniformly and stably, so that the stability is ensured; after entering the central circulation pipe evaporator 3 for evaporation, the evaporation and vaporization separation speed is accelerated, so that the production time is shortened; furthermore, the central circulation pipe evaporator 3 is directly installed below the desolventizing tower 2 for combined use, so that the structure is compact, the space utilization rate is improved, the solution of the central circulation pipe evaporator 3 is good in circulation, high in conductivity and large in evaporation capacity, and the continuous and stable steam flow output is realized, the continuous evaporation under the basically stable temperature state is ensured, the energy consumption is reduced, and the efficiency is improved.

Example 2

The heating evaporation system of the central circulation pipe evaporator of the embodiment is basically the same as that of embodiment 1, further, in this embodiment, the condenser comprises a first-stage condenser 4 and a second-stage condenser 5 which are sequentially arranged, a desolventizing tower discharge port 24 is arranged at the top of the desolventizing tower 2, the desolventizing tower discharge port 24 is communicated with a first-stage condenser feed port 41 through a desolventizing tower riser 26, the first-stage condenser discharge port 42 is communicated with a second-stage condenser feed port 51, and a first-stage condenser produced liquid phase outlet 43 and a second-stage condenser produced liquid phase outlet 52 are both communicated with the water separator 6; the condenser off-gas discharge port 53 of the secondary condenser 5 is communicated to the off-gas collection tank 8.

Specifically, the primary condenser feed inlet 41 is disposed at the top of the primary condenser 4, the primary condenser discharge outlet 42 is disposed at the lower portion of the primary condenser 4, and the primary condenser liquid phase outlet 43 is disposed at the bottom of the primary condenser 4. The secondary condenser feed inlet 51 sets up in the top of secondary condenser 5, and the secondary condenser produces liquid phase export 52 and sets up in the bottom of secondary condenser 5, and condenser tail gas discharge opening 53 sets up in the lower part of secondary condenser 5. The lower part of the water separator 6 is provided with a water separator liquid phase inlet 62, and a primary condenser produced liquid phase outlet 43 and a secondary condenser produced liquid phase outlet 52 are connected in parallel through pipelines and then are communicated to the water separator 6 through the water separator liquid phase inlet 62. The solution after the first-stage condenser 4 is liquefied by circulating water through cooling enters the water separator 6, the non-liquefied gas enters the second-stage condenser 5 and is further liquefied by the refrigerant, the non-liquefied gas enters the water separator 6 through the second-stage condensation cooling, the water phase extracted by the water separator 6 directly enters the water phase collecting tank 7, and the tail gas is collected and treated in a concentrated mode. The tail gas collection tank 8 is communicated with a workshop tail gas treatment device, so that environmental pollution is avoided, and the environment in a workshop is further improved.

Example 3

The heating evaporation system of the central circulation pipe evaporator of this embodiment is basically the same as that of embodiment 1, further, the bottom of the water separator 6 is provided with a water separator water phase outlet 63, the water separator water phase outlet 63 is communicated with the water phase collecting tank 7, the top of the water separator 6 is provided with a water separator tail gas discharge port 61, and the water separator tail gas discharge port 61 is connected in parallel with the condenser tail gas discharge port 53 and communicated with the tail gas collecting tank 8 together. The upper part of the water separator 6 is also provided with a water separator oil phase outlet 64, the upper part of the desolventizing tower 2 is provided with a secondary water washing oil phase feed inlet 25, and the water separator oil phase outlet 64 is communicated with the upper part of the desolventizing tower 2 through the secondary water washing oil phase feed inlet 25.

In this embodiment, the liquefied solution enters the water separator 6, a small amount of oil phase is contained in the liquid phase entering the water separator 6 after once extraction, the oil phase in the water separator 6 reenters the desolventizing tower 2 through the upper end water separator oil phase outlet 64 and the secondary water washing oil phase feed inlet 25 by utilizing the characteristic that the oil phase density is high and the water phase density is different, the two evaporation and separation are sequentially carried out, the continuous liquid-liquid separation process reduces the liquid phase containing the oil phase in the water phase to the minimum, ensures that the water phase and the oil phase in the solution are all evaporated and separated, and a higher water phase product is produced, thereby improving the product quality and the production efficiency.

The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.

Claims (10)

1. A central circulation tube evaporator heating evaporation system, characterized in that: the device comprises a preheater (1), a desolventizing tower (2), a central circulating pipe evaporator (3), a condenser and a water separator (6), wherein a discharge hole (12) of the preheater is connected with a primary water washing feed hole (21) of the desolventizing tower (2), a liquid distribution disc (22) is arranged in the desolventizing tower (2), an evaporation separator (23) and the central circulating pipe evaporator (3) are sequentially connected with the lower end of the desolventizing tower (2), a discharge hole (24) of the desolventizing tower is communicated with the condenser through a desolventizing tower riser (26), a liquid phase outlet of the condenser is communicated with a liquid phase inlet (62) of the water separator, a water phase outlet (63) of the water separator is communicated with a water phase collecting tank (7), and tail gas outlets of the condenser and the water separator (6) are respectively communicated with a tail gas collecting tank (8).

2. A central circulation tube evaporator heating evaporation system according to claim 1, wherein: the condenser comprises a first-stage condenser (4) and a second-stage condenser (5) which are sequentially arranged, a stripping tower riser (26) is communicated with a first-stage condenser feed inlet (41), a first-stage condenser discharge outlet (42) is communicated to a second-stage condenser feed inlet (51), and a first-stage condenser produced liquid phase outlet (43) and a second-stage condenser produced liquid phase outlet (52) are both communicated to a water separator (6); the condenser tail gas discharge port (53) of the secondary condenser (5) is communicated with the tail gas collecting tank (8).

3. A central circulation tube evaporator temperature rising evaporation system according to claim 2, wherein: the lower part of the water separator (6) is provided with a water separator liquid phase inlet (62), and a primary condenser produced liquid phase outlet (43) and a secondary condenser produced liquid phase outlet (52) are communicated to the water separator (6) through the water separator liquid phase inlet (62) after being connected in parallel through pipelines.

4. A central circulation tube evaporator temperature rising evaporation system according to claim 2, wherein: the bottom of the water separator (6) is provided with a water separator water phase outlet (63), the water separator water phase outlet (63) is communicated with a water phase collecting tank (7), the top of the water separator (6) is provided with a water separator tail gas discharge port (61), and the water separator tail gas discharge port (61) is communicated with a tail gas collecting tank (8).

5. A central circulation tube evaporator temperature rising evaporation system according to claim 4, wherein: the upper part of the water separator (6) is also provided with a water separator oil phase outlet (64), the upper part of the desolventizing tower (2) is provided with a secondary water washing oil phase feed inlet (25), and the water separator oil phase outlet (64) is communicated with the upper part of the desolventizing tower (2) through the secondary water washing oil phase feed inlet (25).

6. A central circulation tube evaporator temperature rising evaporation system according to claim 2, wherein: the first-stage condenser feed inlet (41) is arranged at the top of the first-stage condenser (4), the first-stage condenser discharge outlet (42) is arranged at the lower part of the first-stage condenser (4), and the first-stage condenser liquid phase outlet (43) is arranged at the bottom of the first-stage condenser (4).

7. A central circulation tube evaporator temperature rising evaporation system according to claim 2, wherein: the feed inlet (51) of the secondary condenser is arranged at the top of the secondary condenser (5), the liquid phase outlet (52) of the secondary condenser is arranged at the bottom of the secondary condenser (5), and the tail gas discharge outlet (53) of the condenser is arranged at the lower part of the secondary condenser (5).

8. A central circulation tube evaporator heating evaporation system according to any of claims 1-7, wherein: the upper part of the side edge of the central circulation pipe evaporator (3) is provided with a steam inlet (33), liquefied steam is discharged through a steam drain pipe (34) at the lower part of the central circulation pipe evaporator (3), and the steam drain pipe (34) is provided with a steam drain valve and a standby drain valve in parallel.

9. A central circulation tube evaporator heating evaporation system according to any of claims 1-7, wherein: the bottom of the evaporation separator (23) is connected with the top of the central circulation pipe evaporator (3) through flange fit installation.

10. A central circulation tube evaporator heating evaporation system according to any of claims 1-7, wherein: the central circulation pipe evaporator (3) is internally provided with a central circulation pipe (31) and a heating pipe (32) circumferentially arranged on the outer side of the central circulation pipe (31), and the pipe diameter of the central circulation pipe (31) is larger than that of the heating pipe (32).