CN106362425A - Multi-effect evaporative crystallization device with multi-temperature steam combination drive cross tube and falling film - Google Patents

Abstract

The invention discloses a seawater desalination device, in particular to a multi-temperature water-vapor mixed-driven horizontal tube falling film multi-effect evaporation crystallization device, which belongs to the technical field of seawater desalination devices; the device includes at least two steam generators, at least two evaporation The steam generator is driven by multi-temperature waste hot water such as high temperature and low temperature, combined with the steam driving device to add driving steam, desalinating seawater in the evaporator, and desalinating the steam by the condenser. Condensation and collection are carried out, and the resulting concentrated liquid finally flows into the separator to recycle water resources and collect evaporated and crystallized crystals; the invention solves the problem of industrial waste hot water utilization, and can use multi-temperature waste hot water combined with steam to drive The device supplements driving steam to improve the efficiency of seawater desalination, and at the same time combines the setting of the separator to recycle water resources and collect useful solutes.

Description

Multi-temperature water-vapor mixing drive horizontal tube falling film multi-effect evaporation crystallization device

technical field

The invention relates to a seawater desalination device, in particular to a multi-temperature water-vapor mixed-driven horizontal-tube falling-film multi-effect evaporation crystallization device, which belongs to the technical field of seawater desalination devices.

Background technique

At present, many distillation devices have many designs to meet liquid-liquid separation, such as forced circulation, flash evaporation, horizontal tube falling film, etc. These designs all need to consume steam to drive, and there are also vapor compression distillation devices driven by electric energy. Both electric energy and steam drive consume high-grade energy, and there is a large amount of hot water in industrial production, none of the existing distillation devices use hot water as power drive, and the horizontal tube falling film evaporation device does not use hot water drive.

In industrial production, especially in coastal areas, most industrial production requires a large amount of fresh water, and the fresh water liquid after use can be reused through filtration, and a large part of the water is vaporized due to the high temperature in industrial production. The loss of water vapor not only wastes water resources but also wastes a lot of heat. If it can be fully utilized, it will be of great significance to resource saving and cost reduction.

When using the temperature of industrial waste hot water, it is often not possible to fully utilize the heat contained in the waste hot water. Therefore, it is necessary to further improve the design for the heat utilization rate of industrial waste hot water.

In the current crystallization device, many evaporation crystallization devices have many designs to meet the solid-liquid separation, forced circulation, flash evaporation, etc. These designs all need to consume steam to drive, and there are also vapor compression evaporation crystallization devices driven by electric energy. Both electric energy and steam drive consume high-grade energy, and there is a large amount of hot water in industrial production. None of the existing evaporation and crystallization devices use hot water as power drive, and the horizontal tube falling film evaporation device does not use crystallizers, nor does it use heat. Water drives evaporation. In the seawater desalination process, the treated seawater concentrate can be further processed to obtain more industrial raw materials.

Contents of the invention

The purpose of the present invention is to: aim at the above existing problems, provide a kind of low-grade multi-temperature water mixing to drive steam as power to drive evaporation and crystallization to separate solids and liquids, rationally utilize the energy of hot water in the production process, and also It can collect the condensate separated from hot water at various temperatures and the condensate from seawater desalination. The multi-temperature water vapor mixing drives the horizontal tube falling film multi-effect evaporation crystallization device.

The technical scheme that the present invention adopts is as follows:

A multi-temperature water-vapor mixing-driven horizontal tube falling film multi-effect evaporation crystallization device, comprising at least 2 steam generators, at least 2 evaporators, condensers, separators and steam-driven devices, the separators are provided with feed port, liquid material outlet and slurry outlet, the steam generator is provided with a first liquid inlet, a gas outlet and a liquid discharge port, and the liquid channel of each steam generator and the feed port of the separator are connected in series to dissipate the high-temperature waste heat The water pipe communicates with the separator, and the evaporator is also provided with a second liquid inlet; the evaporator is provided with a condensate nozzle, a feed liquid replenishment nozzle, a feed liquid discharge nozzle and a steam pipe for steam circulation The steam passages of each evaporator are connected in series to the steam drive device and the condenser, and the feed-liquid replenishment pipes of each evaporator are connected in parallel with the feed-liquid replenishment pipe, and the steam pipes include a steam inlet and a steam outlet. The gas outlets of the steam generator communicate with the steam inlets of the evaporator respectively, and the condenser communicates with the condensed water pipe.

In the multi-temperature water-vapor mixing-driven horizontal tube falling-film multi-effect evaporation and crystallization device of the present invention, the number of steam generators does not exceed the number of evaporators. This can ensure that one steam generator corresponds to one evaporator, thereby making full use of heat energy.

Further, the number of steam generators can also exceed the number of evaporators. The gas outlet of the steam generator without matching evaporator can be directly connected with the condenser to directly collect a small amount of steam generated by the waste heat of industrial waste water.

Further, there are four steam generators and four evaporators. This design method has the widest application range and the highest efficiency.

In the multi-temperature water-vapor mixing-driven horizontal tube falling film multi-effect evaporation and crystallization device of the present invention, the condensate nozzle includes one condensate inlet and two condensate outlets. The series connection of the condensate can be realized, and the condensate with heat can be fully utilized again.

Further, the condensate channel is connected in series with the condensate water pipe. The utilization rate of heat energy is improved by means of series connection.

In the multi-temperature water-vapor mixed-driven horizontal-tube falling-film multi-effect evaporation and crystallization device of the present invention, the condensate nozzle is connected in parallel with the condensate water pipe. The way of parallel connection can shorten the pipeline distance of condensate.

In the multi-temperature water-vapor mixed-driven horizontal tube falling film multi-effect evaporation and crystallization device of the present invention, the liquid discharge nozzle located at the far end of the feed liquid replenishment pipe is connected to the concentrated liquid collection pipe, and the feed liquid discharge nozzles of other evaporators pass through The circulating pump is connected with the feed-liquid replenishment pipe to form a reverse feed-liquid series channel. In this way, the material liquid can be recycled after being evaporated and utilized, and the seawater can be fully desalinated.

Further, the feed liquid discharge nozzle of the evaporator located at the far end of the feed liquid replenishment pipe is also communicated with the feed liquid replenishment pipe through a circulating pump. The design of this method can not only recycle the higher temperature seawater flowing out of the last stage, but also speed up the discharge of seawater in the packaged equipment when the equipment stops.

In the multi-temperature, water-vapor mixed-driven horizontal-tube falling-film multi-effect evaporation and crystallization device of the present invention, the feed-liquid discharge nozzles of each evaporator are connected in parallel with the concentrated liquid collection pipe. It can quickly discharge the liquid in the evaporator.

In the multi-temperature water-vapor mixing driven horizontal tube falling film multi-effect evaporation and crystallization device of the present invention, the steam generator also includes a casing with a cavity, and the interior of the casing is sequentially provided with a foam splasher, a partition and a distribution panel from top to bottom. The middle part of the partition is also provided with a circulation return cylinder, the first liquid inlet and the second liquid inlet are connected to the distributor, the air outlet is located on the shell above the foam device, and the liquid outlet is located on the below the housing.

Further, the distributor is a ring, and the distributor is provided with injection channels for industrial wastewater injection.

Further, the injection channel is an annular groove opened on the ring.

Further, the opening of the annular groove is downward. It can make larger impurities enter the steam generator and settle down.

A method for desalinating seawater with multi-temperature water-vapor mixing driven horizontal tube falling film multi-effect evaporation and crystallization device, comprising the following steps:

a. The waste hot water is introduced into the I-effect steam generator through the high-temperature waste hot water collection pipe, and the steam is introduced into the I-effect evaporator along with the outlet of the I-effect steam generator, and the waste hot water enters other steam generators in turn through the liquid discharge port In the evaporator, the generated steam enters the corresponding evaporator through the gas outlet, and the waste hot water finally enters the concentrate pipe;

b. The steam driving device will drive the steam to enter through the steam inlet of the I-effect evaporator 1, and enter the other evaporators through the steam outlet of the I-effect evaporator in turn, and enter the condenser together with the steam introduced by the steam generator to cool, and the condensate is introduced Condensate pipe;

c. The feed liquid replenishment pipe introduces seawater into the evaporator in parallel, and evaporates it twice in the evaporator to desalinate the seawater;

d. The condensate and distillate produced in the evaporator are collected into the condensate pipe through the condensate nozzle;

e. The desalinated seawater is collected into the concentrated liquid collection pipe through the discharge nozzle of the feed liquid;

f. The concentrated liquid main pipe enters the separator through the feed inlet, and the temperature of the waste hot water is used to evaporate and crystallize. The liquid material is introduced into the feed liquid replenishment pipe through the liquid material outlet, and the crystals produced are discharged and collected through the slurry outlet.

A method for desalinating seawater in a horizontal tube falling film multi-effect evaporation and crystallization device driven by multi-temperature water-vapor mixing in the present invention, the condensate and distillate described in step d enter other evaporators sequentially from the I-effect evaporator, and finally discharge to the condensate in the water pipe.

A method for desalinating seawater in a multi-temperature water-vapor mixing driven horizontal tube falling film multi-effect evaporation and crystallization device of the present invention, the desalinated seawater described in step e enters the feed liquid replenishment pipe through the feed liquid discharge nozzle and then introduces it into other evaporators , and finally collected into the concentrated liquid collection pipe through the feed-liquid replenishment pipe of the I-effect steam generator.

In summary, owing to adopting above-mentioned technical scheme, the beneficial effect of the present invention is:

1. Using the multi-temperature water-vapor mixing drive horizontal tube falling film multi-effect evaporation and crystallization device of the present invention solves the problem of industrial waste hot water utilization, and the industrial waste water can be fully recovered through the method of cascaded utilization of high-temperature waste water and filling in low-temperature waste water. Utilizing the thermal energy of hot water, combined with driving steam can effectively ensure the efficiency of seawater desalination and meet the needs of industrial production.

2. The multi-temperature water-vapor mixing-driven horizontal tube falling film multi-effect evaporation and crystallization device of the present invention can make full use of water resources. Through the setting of the separator, evaporation and crystallization can be realized under the drive of hot water, and the liquid can be reused. At the same time Able to produce certain crystal solutes.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation of evaporator;

Fig. 3 is a structural schematic diagram of the steam generator.

Marks in the picture: 1-effect evaporator, 2-effect evaporator, 3-effect evaporator, 4-effect evaporator, 5-condenser, 6-condensate pipe, 7-circulation pump, 8-concentration Liquid collecting pipe, 9-feed liquid replenishment pipe, 10-condensate nozzle, 10a-condensate inlet, 10b-condensate outlet, 11-steam nozzle, 11a-steam inlet, 11b-steam outlet, 12-material liquid Supplementary nozzle, 13-material liquid discharge nozzle, 14-high temperature waste hot water main pipe, 15-Ⅰ effect steam generator, 16-Ⅱ effect steam generator, 17-Ⅲ effect steam reactor, 18-Ⅳ effect steam Generator, 19-first liquid inlet, 20-air outlet, 21-liquid outlet, 22-shell, 23-splasher, 24-partition, 25-distributor, 26-circulation return cylinder, 27-maintenance port, 28-low temperature waste hot water pipe, 29-second liquid inlet, 30-separator, 30a-feed inlet, 30b-slurry outlet, 30c-liquid material outlet, 31-steam drive device.

detailed description

All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and/or steps.

Any feature disclosed in this specification, unless specifically stated, can be replaced by other alternative features that are equivalent or have similar purposes. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

Example 1

A multi-temperature water-vapor mixed-driven horizontal tube falling film multi-effect evaporation crystallization device, as shown in Figure 1, includes at least 2 steam generators, at least 2 evaporators, a condenser 5, a separator 30 and a steam drive device 31 , the separator 30 is provided with a feed inlet 30a, a liquid material outlet 30c and a slurry outlet 30b, as shown in Figure 3, the steam generator is provided with a first liquid inlet 19, a gas outlet 20 and a discharge The liquid port 21, the liquid channel of each steam generator and the feed port 30a of the separator 30 are connected in series to the high-temperature waste water pipe 14 and the separator 30, and the second liquid inlet 29 is also arranged on the evaporator; as shown in the figure 2, the evaporator is provided with a condensate nozzle 10, a feed liquid replenishment nozzle 12, a feed liquid discharge nozzle 13 and a steam nozzle 11 for steam circulation, and the steam channels of each evaporator are connected in series to drive the steam The device 31 is communicated with the condenser 5, and the feed-liquid replenishment nozzle of each evaporator is connected in parallel with the feed-liquid replenishment pipe 9, and the steam pipe 11 includes a steam inlet 11a and a steam outlet 11b, and the gas outlet of each steam generator 20 communicate with the steam inlet 11a of the evaporator respectively, and the condenser 5 communicates with the condensed water pipe 6 .

Specifically, in this embodiment, the evaporator is a horizontal tube falling film evaporator. Further, the liquid discharge port 21 is also connected in parallel with the concentrated liquid collecting pipe 8 . In normal operation, in the last steam generator, all industrial waste hot water passes through the steam generator and then flows into the concentrate. That is, the liquid pipeline between the two steam generators at the far end is provided with a valve for preventing industrial waste water from directly entering the concentrated liquid collecting pipe 8 .

In one specific embodiment, the number of steam generators does not exceed the number of evaporators. This can fully ensure that the steam generated by the steam generator enters the evaporator for use. Of course, in another specific embodiment, the number of steam generators can also exceed the number of evaporators. The gas outlet 20 of the steam generator that does not have an evaporator matching it is communicated with the condenser 5 .

In another specific embodiment, there are four steam generators and four evaporators. That is: the steam generator includes the I-effect steam generator 15, the II-effect steam generator 16, the III-effect steam reactor 17 and the IV-effect steam generator 18; the evaporator includes the I-effect evaporator 1, the II-effect evaporator 2, III effect evaporator 3 and IV effect evaporator 4. This design method has the widest application range and the highest practical efficiency. Of course, this mode is not limited to 4, and in other embodiments, it can also be set to a different number, such as 2, 3 or 6 according to the practical environment requirements.

Specifically, the liquid channel of each of the above-mentioned steam generators and the feed port 30a of the separator 30 are connected in series to connect the high-temperature waste water pipe 14 and the separator 30, and the connection method is, for example: the high-temperature waste water main pipe 14 and the I-effect evaporator 15 The liquid inlet 19 of the first effect steam generator 15 is connected with the first liquid inlet 19 of the second effect steam generator 16, and the liquid outlet 21 of the second effect steam generator 16 is connected with the third effect steam generator The first liquid inlet 19 of device 17 is connected, and the liquid outlet 21 of III effect steam generator 17 is connected with the first liquid inlet 19 of IV effect steam generator 18, and the liquid outlet 21 of IV effect steam generator 18 is connected with The concentrated liquid collecting pipe 8 communicates with the separator 30 through the feed port 30a.

As a further optimization, in one of the specific embodiments, the second liquid inlet 29 of the steam generator near the end of the high-temperature waste water pipe 14 communicates with the high-temperature waste water pipe 14, and the second liquid inlet 29 of the remaining steam generators are connected in parallel. It communicates with the low-temperature hot water pipe 28, for example: the second liquid inlet 29 of the I-effect steam generator 15 communicates with the high-temperature waste hot water pipe 14, the second liquid inlet 29 of the II-effect steam generator 16, and the III-effect steam generator The second liquid inlet 29 of 17 and the second liquid inlet 29 of the IV effect steam generator 18 communicate with the low-temperature waste water pipe 28 respectively. In this implementation, the first liquid inlet 19 and the second liquid inlet 29 of the I-effect steam generator 15 share one nozzle.

The steam passages of the above-mentioned evaporators are connected in series to the steam driving device 31 and the condenser 5. The connection mode is, for example: the steam driving device 31 is connected to the steam inlet 11a of the I-effect evaporator 1, and the steam outlet 11b of the I-effect evaporator 1 is connected to the The steam inlet 11a of the II effect evaporator 2 is connected, the steam outlet 11b of the II effect evaporator is connected with the steam inlet 11a of the III effect evaporator 3, the steam outlet 11b of the III effect evaporator 3 is connected with the steam inlet 11a of the IV effect evaporator 4 The steam outlet 11b of the IV effect evaporator 4 communicates with the condenser 5.

The gas outlets 20 of the above-mentioned steam generators communicate with the steam inlets 11a of the evaporator respectively. The connection mode is, for example: the gas outlet 20 of the I-effect steam generator 15 communicates with the steam pipe inlet 11a of the I-effect evaporator 1, and the II-effect steam generates The gas outlet 20 of the device 16 communicates with the steam pipe inlet 11a of the II-effect evaporator 2, the gas outlet 20 of the III-effect steam generator 17 communicates with the steam pipe inlet 11a of the III-effect evaporator 3, and the outlet of the IV-effect steam generator 18 The gas port 20 communicates with the steam pipe inlet 11a of the IV effect evaporator 4 .

On the basis of the above design, the condensate nozzle 10 is further designed. In another specific embodiment, the condensate nozzle 10 includes one condensate inlet 10a and two condensate outlets 10b. One of the condensate outlets 10b is located at the end of the horizontal tube outlet of the evaporator, and is used to collect the condensate coming out of the horizontal tube, and the other condensate outlet 10b is located at the end of the horizontal tube inlet of the evaporator, and is close to the condensate Liquid inlet 10a. Further, in order to effectively increase the temperature of the condensate itself and the steam contained in the condensate, in one specific embodiment, the condensate channel is connected in series with the condensate pipe 6, for example: the condensate inlet 10a of the I-effect evaporator 1 Closed, the condensate outlet 10b of the I-effect evaporator 1 is connected with the condensate inlet 10a of the II-effect evaporator 2, the condensate outlet 10b of the II-effect evaporator 2 is connected with the condensate inlet 10a of the III-effect evaporator 3, and the III-effect The condensate outlet 10b of the evaporator 3 communicates with the condensate inlet 10a of the IV effect evaporator 4 , and the condensate outlet 10b of the IV effect evaporator 4 communicates with the condensate pipe 6 . The first condensate comes out with a certain amount of steam and has a certain temperature. In order to make full use of the waste heat, it enters the next-stage evaporator in turn, and the amount of steam accompanying the final condensate is minimized.

Certainly, the outlet of the condensate may be designed as a conventional design, or only one condensate nozzle 10 may be designed. Therefore, on the basis of the above embodiments, the connection mode of the condensate nozzle 10 is not limited to a series connection, and in another specific embodiment, the condensate nozzle 10 can also be connected with the condensate pipe 8 in parallel. connected. The condensate nozzle 10 of each evaporator is directly connected to the condensate pipe 8, and the liquefied condensate is directly collected in parallel, which can shorten the pipeline distance of the condensate.

In another specific embodiment, the feed liquid discharge nozzle 13 of the evaporator located at the far end of the feed liquid replenishment pipe 9 communicates with the separator 30 through the concentrated liquid collecting pipe 8, and the feed liquid discharge nozzle 13 of other evaporators passes through The circulation pump 7 communicates with the feed liquid replenishment pipe 9 . For example, as shown in Figure 1, the I-effect evaporator 1 is located at the far end of the feed liquid replenishment pipe 9, therefore, the material is discharged through the channels formed in series, that is, the sequence is: IV-effect evaporator 4, III-effect evaporator 3. II-effect evaporator 2 to I-effect evaporator 1. In this way, the temperature in the system is fully utilized so that seawater can be fully desalinated. On the basis of this design, further, the feed liquid discharge nozzle 13 of the evaporator located at the far end of the feed liquid replenishment pipe 9 communicates with the feed liquid replenishment pipe 9 through the circulating pump 7 . In this way, the seawater can be fully utilized and fully desalinated, and the problem of seawater being discharged without being fully desalinated is solved. For example, a valve is added to the pipeline for discharging the concentrated liquid to the concentrated liquid collecting pipe 8. The direction of the feed liquid is to make full use of seawater resources through the circulation pump 7. The discharge of the concentrated liquid after evaporation is ensured, and the concentrated liquid in the last stage of the material channel is recycled again at the same time.

In another specific embodiment, the feed liquid discharge nozzle 13 is connected in parallel with the concentrated liquid collecting pipe 8 . It can quickly and effectively discharge the liquid inside the evaporator.

The practical object of the steam generator is industrial waste hot water. Therefore, in one specific embodiment, the steam generator also includes a casing 22 with a cavity, and the interior of the casing is sequentially arranged with foam 23, partition 24 and distributor 25, the middle part of the partition is also provided with a circulation return cylinder 26, the first liquid inlet 19 and the second liquid inlet 29 communicate with the distributor 25, and the gas outlet 20 is located at On the housing where the foamer 23 is located above, the liquid discharge port 21 is located below the housing. This method can effectively filter out impurities in industrial waste water and foam generated by steam and waste water. Specifically, the distributor 25 is in the shape of a ring, and a spray channel for spraying industrial wastewater is opened on the ring. Preferably, the injection channel is an annular groove opened on the ring. Further, the opening of the annular groove is downward. It can make larger impurities enter the steam generator and settle down. More specifically, the steam generator is also provided with an equipment maintenance port 27 for equipment maintenance.

The seawater desalination method of the multi-temperature water-vapor mixing driven horizontal tube falling film multi-effect evaporation and crystallization device designed in this embodiment includes the following steps:

a. The waste hot water is introduced into the I-effect steam generator 15 through the high-temperature waste hot water collecting pipe 14, the steam is introduced into the I-effect evaporator 1 along with the gas outlet 20 of the I-effect steam generator 15, and the waste water passes through the liquid outlet 21 into other steam generators in turn, the generated steam enters the corresponding evaporator through the gas outlet, and the waste hot water finally enters the concentrated liquid collecting pipe 8;

b. The steam driving device 31 will drive steam to enter through the steam inlet 11a of the I-effect evaporator 1, and enter other evaporators through the steam outlet 11b of the I-effect evaporator 1 in turn, and enter the condenser together with the steam introduced by the steam generator for cooling , the condensate is introduced into the condensate pipe 6;

c. The feed-liquid replenishment pipe 9 introduces seawater into the evaporator in parallel, and evaporates it twice in the evaporator to desalinate the seawater;

d. The condensate and distillate produced in the evaporator are collected into the condensate pipe (6) through the condensate nozzle 10;

e, the desalinated seawater is collected in the concentrated liquid collecting pipe 8 through the feed liquid discharge nozzle 13;

f. The concentrated liquid main pipe 8 enters the separator 31 through the feed port 31a, and is evaporated and crystallized by the temperature of the waste hot water. The liquid material is introduced into the feed liquid replenishment pipe 9 through the liquid material outlet 31c, and the generated crystals are discharged and collected through the slurry outlet 31b.

Specifically, the condensate and distillate described in step d enter other evaporators sequentially from the I-effect evaporator 1 , and are finally discharged into the condensate water pipe 6 .

More specifically, the desalinated seawater in step e enters the feed liquid replenishment pipe 9 through the feed liquid discharge nozzle 13 and is introduced into other evaporators again, and finally is collected through the feed liquid replenishment pipe 9 of the I-effect steam generator 1 to concentrate Liquid collection tube 8.

In summary, using the multi-temperature water-vapor mixing drive horizontal tube falling film multi-effect evaporation and crystallization device of the present invention solves the problem of industrial waste hot water utilization, and can use multi-temperature waste hot water, combined with the steam drive device to add driving steam Improve the efficiency of seawater desalination, and at the same time combine the setting of the separator to recycle water resources and collect useful solutes, effectively saving water resources and energy.

The present invention is not limited to the foregoing specific embodiments. The present invention extends to any new feature or any new combination disclosed in this specification, and any new method or process step or any new combination disclosed.

Claims (10)

1. a kind of many warm water vapour combination drive horizontal tube falling film multiple-effect evaporation crystallization apparatus it is characterised in that: include at least 2 steam Generator, at least 2 vaporizers, condenser (5), separator (30) and steam drive apparatus (31), on described separator (30) It is provided with charging aperture (30a), liquid material outlet (30c) and slurry outlet (30b), described steam generator is provided with the first inlet (19), gas outlet (20) and leakage fluid dram (21), the charging aperture (30a) of the fluid passage of each steam generator and separator (30) By series connection, high temperature waste hot water pipe (14) is connected with separator (30), described vaporizer is additionally provided with the second inlet (29)；Described vaporizer is provided with the condensed fluid mouth of pipe (10), the supplementary mouth of pipe (12) of feed liquid, feed liquid discharge (13) and is used for steam The steam mouth of pipe (11) of circulation, steam drive apparatus (31) are connected by the steam channel series connection of each vaporizer with condenser (5), The feed liquid of each vaporizer is supplemented mouth of pipe pipe (9) supplementary with feed liquid in parallel and is connected, and the described steam mouth of pipe (11) includes steam inlet (11a) with steam (vapor) outlet (11b), gas outlet (20) steam inlet with vaporizer respectively of each steam generator described (11a) corresponding connection, described condenser (5) is connected with condensate pipe (6).

2. as claimed in claim 1 many warm water vapour combination drive horizontal tube falling film multiple-effect evaporation crystallization apparatus it is characterised in that: institute The quantity stating steam generator is less than the quantity of vaporizer.

3. as claimed in claim 1 many warm water vapour combination drive horizontal tube falling film multiple-effect evaporation crystallization apparatus it is characterised in that: institute State steam generator and the quantity of vaporizer is 4.

4. as claimed in claim 1 many warm water vapour combination drive horizontal tube falling film multiple-effect evaporation crystallization apparatus it is characterised in that: institute State the described condensed fluid mouth of pipe (10) and include 1 condensed fluid import (10a) and 2 condensate outlets (10b), described condensed fluid passage Series connection is connected with condensate pipe (6).

5. as claimed in claim 1 many warm water vapour combination drive horizontal tube falling film multiple-effect evaporation crystallization apparatus it is characterised in that: institute Rheme is connected with concentrated solution gathering tube (8) in the liquid discharge (13) that feed liquid supplements pipe (9) far-end, other each vaporizers Feed liquid discharge (13) passes through circulating pump (7) pipe (9) supplementary with feed liquid and connects, and forms reverse feed liquid channels in series.

6. as claimed in claim 4 many warm water vapour combination drive horizontal tube falling film multiple-effect evaporation crystallization apparatus it is characterised in that: institute The feed liquid discharge (13) that rheme supplements the vaporizer of pipe (9) far-end in feed liquid supplements pipe also by circulating pump (7) with feed liquid (9) connect.

7. as claimed in claim 1 many warm water vapour combination drive horizontal tube falling film multiple-effect evaporation crystallization apparatus it is characterised in that: institute State the housing (22) that steam generator also includes having cavity, enclosure interior be from top to bottom disposed with foam-blocker (23), every Plate (24) and distributor (25), are additionally provided with circulation returning charge cylinder (26), described first inlet (19) and the in the middle part of described dividing plate Two inlets (29) are connected with distributor (25), and gas outlet (20) are located on the housing being located above foam-blocker (23), leakage fluid dram (21) it is located at below housing.

8. the side that many warm water vapour combination drive horizontal tube falling film multiple-effect evaporation crystallization apparatus desalinize seawater as claimed in claim 1 Method it is characterised in that: comprise the following steps:

A, by high temperature waste hot water gathering tube (14), spent hot water is introduced in effect steam generator (15), steam is with imitating steam Generator (15) gas outlet (20) is introduced in effect vaporizer (1), and spent hot water sequentially enters other steam by leakage fluid dram (21) and sends out In raw device, the steam of generation enters in corresponding vaporizer by gas outlet, and spent hot water eventually enters into concentrated solution gathering tube (8)；

The steam inlet (11a) driving steam to pass through to imitate vaporizer 1 is entered by b, steam drive apparatus (31), is evaporated by effect The steam (vapor) outlet (11b) of device (1) sequentially enters other vaporizers, enters condenser together with the steam that steam generator introduces Middle cooling, condensed fluid introduces condensate pipe (6)；

C, feed liquid are supplemented pipe (9) and sea water parallel connection are introduced in vaporizer, and double evaporation-cooling in vaporizer carries out desalinization；

In d, vaporizer, the condensed fluid producing and distillate are collected in condensate pipe (6) by the condensed fluid mouth of pipe (10)；

Sea water after e, desalination is collected in concentrated solution gathering tube (8) by feed liquid discharge (13)；

F, concentrated solution house steward (8) enter separator (31) by charging aperture (31a), borrow the temperature evaporative crystallization of spent hot water, liquid Material supplements pipe (9) by liquid material outlet (31c) introducing feed liquid, and the crystal of generation passes through slurry outlet (31b) and discharges collection.

9. the side that many warm water vapour combination drive horizontal tube falling film multiple-effect evaporation crystallization apparatus desalinize seawater as claimed in claim 8 Method it is characterised in that: condensed fluid described in step d and distillate enter other vaporizers from effect vaporizer (1), the most successively After be emitted in condensate pipe (6).

10. the side that many warm water vapour combination drive horizontal tube falling film multiple-effect evaporation crystallization apparatus desalinize seawater as claimed in claim 8 Method it is characterised in that: described in step e desalinate after sea water by feed liquid discharge (13) enter feed liquid supplement pipe (9) in again Secondary be introduced in other vaporizers, finally by effect steam generator (1) feed liquid supplement pipe (9) collect concentrated solution gathering tube (8) in.