阅读说明：本技术 一种对流式—ii型蒸发冷凝单元及海水淡化装置 (Convection type-II type evaporation and condensation unit and seawater desalination device ) 是由 周权宝 左林桂 于 2019-10-24 设计创作，主要内容包括：本发明公开了一种对流式—II型蒸发冷凝单元,用于海水淡化装置,海水淡化装置包括多个对流式—II型蒸发冷凝单元,对流式—II型蒸发冷凝单元包括加热层、冷凝层以及进气层,加热层、冷凝层以及进气层由上至下层叠设置,加热层供热水流过,冷凝层供海水流过,加热层浸泡在冷凝层中,进气层开设有进气孔,位于下方的对流式—II型蒸发冷凝单元的加热层产生蒸汽,通过进气孔上升。冷海水进入至冷凝层后,一方面在冷凝层与蒸汽交换热量,接受蒸汽转变为蒸馏水的相变潜热,另一方面被加热层中的热水所加热,相较于现有技术中,不需要额外的冷却水进行冷却,节省能源,且成本低,产能高。本发明还公开了一种带有该对流式—II型蒸发冷凝单元的海水淡化装置。(The invention discloses a convection type-II type evaporation and condensation unit, which is used for a seawater desalination device, wherein the seawater desalination device comprises a plurality of convection type-II type evaporation and condensation units, each convection type-II type evaporation and condensation unit comprises a heating layer, a condensation layer and an air inlet layer, the heating layer, the condensation layer and the air inlet layer are arranged in a stacking mode from top to bottom, hot water flows through the heating layer, the condensation layer is used for seawater to flow through, the heating layer is soaked in the condensation layer, the air inlet layer is provided with an air inlet hole, and steam is generated by the heating layer of the lower convection type-II type evaporation and condensation unit and rises through the air inlet hole. After cold sea water enters the condensation layer, on the one hand exchange heat with steam at the condensation layer, accept the phase transition latent heat that steam changed into distilled water, on the other hand is heated by the hot water in the zone of heating, compares in prior art, does not need extra cooling water to cool off, and the energy can be saved, and with low costs, the productivity is high. The invention also discloses a seawater desalination device with the convection type-II type evaporation and condensation unit.)

1. The utility model provides a to STREAMING-II type evaporation condensing unit for sea water desalination device which characterized in that: the seawater desalination device comprises a plurality of convection type-II type evaporation and condensation units, the convection type-II type evaporation and condensation units are vertically stacked positively and negatively, the convection type-II type evaporation and condensation units comprise a heating layer, a condensation layer and an air inlet layer, the heating layer, the condensation layer and the air inlet layer are sequentially stacked from top to bottom, the heating layer, the condensation layer and the air inlet layer are of a corrugated plate structure, the heating layer is used for hot water to flow through, the condensation layer is used for seawater to flow through, the heating layer is soaked in the condensation layer, the air inlet layer is formed in the air inlet layer, steam generated by the heating layer of the convection type-II type evaporation and condensation unit is positioned below, the air inlet layer of the convection type-II type evaporation and condensation unit positioned above is lifted and attached to the condensation layer, beads are formed on the lower side of the condensation layer.

2. A convective-type II evaporative condensation unit as set forth in claim 1 wherein: the heating layer comprises a plurality of heat source pipes which are sequentially arranged along the groove direction to jointly form a corrugated plate type structure, and the corrugated fluctuation direction of the heating layer is vertical to the axial direction of the heat source pipes.

3. A convective-type II evaporative condensation unit as set forth in claim 2 wherein: and a heat source inlet pipe and a heat source outlet pipe are respectively arranged on two sides of the heat source pipe, the heat source outlet pipe and the heat source inlet pipe are oppositely arranged, the heat source inlet pipe is communicated with the heat source pipe, the heat source outlet pipe is communicated with the heat source pipe, and hot water flows in from the heat source inlet pipe, flows through the heat source pipe and flows out to the heat source outlet pipe.

4. A convective-type II evaporative condensation unit as set forth in claim 1 wherein: one side edge of the condensation layer is provided with a water spraying header pipe, the water spraying header pipe is communicated with a plurality of parallel water spraying pipes, one water spraying pipe corresponds to one groove of the condensation layer, one end, far away from the water spraying header pipe, of each water spraying pipe extends into the corresponding groove of the condensation layer, seawater passes through the seawater pipe and flows into the condensation layer through the seawater branch pipe, and the seawater overflows from the opposite side edge of the seawater pipe after being full of seawater.

5. A convective-type II evaporative condensation unit as set forth in claim 1 wherein: the air inlet holes on each ridge of the air inlet layer are multiple, and the air inlet holes are distributed in a linear shape at the ridge.

6. A convective-type II evaporative condensation unit as set forth in claim 5 wherein: and a distilled water pipe is arranged on one side of the air inlet layer, a plurality of parallel distilled water collecting pipes are communicated with the distilled water pipe, one distilled water collecting pipe corresponds to one groove of the air inlet layer, and one end of each distilled water collecting pipe extends into the corresponding groove of the air inlet layer.

7. A convective-type II evaporative condensation unit as set forth in claim 1 wherein: the thickness of the condensation layer and the thickness of the air inlet layer are both 1.5-3mm, and the interval between the condensation layer and the air inlet layer is 2-4 mm.

8. A seawater desalination device is characterized in that: the seawater desalination device comprises the convection-type II evaporation and condensation unit as claimed in any one of claims 1 to 7, wherein the convection-type II evaporation and condensation unit is provided with a plurality of units, the convection-type II evaporation and condensation unit is vertically arranged in a positive-negative stacking mode, hot water flows upwards from the convection-type II evaporation and condensation unit positioned below to the convection-type II evaporation and condensation unit positioned above, and seawater flows downwards from the convection-type II evaporation and condensation unit positioned above to the convection-type II evaporation and condensation unit positioned below.

Technical Field

The invention relates to the technical field of seawater desalination, in particular to a convection type-II type evaporation and condensation unit and a seawater desalination device.

Background

With the development of urbanization, the demand of the industry and the life for fresh water is increasing day by day, and the large-scale, efficient and low-cost fresh water acquisition from seawater becomes an important development approach day by day. At present, the seawater desalination technology by distillation is the most commonly used technology, but the seawater is directly heated at high temperature to generate steam, and then is cooled by cold water to obtain distilled water, so that a large amount of energy is consumed in the heating and cooling processes, and the cost for generating one ton of fresh water is high, and even is not enough to offset the cost.

Disclosure of Invention

Therefore, it is necessary to provide a convection type-II type evaporation and condensation unit and a seawater desalination device with low cost and high productivity.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a convection current formula-II type evaporation condensing unit for sea water desalination device, sea water desalination device includes a plurality of convection current formula-II type evaporation condensing unit, convection current formula-II type evaporation condensing unit is vertical just anti-piling up, convection current formula-II type evaporation condensing unit includes zone of heating, condensation layer and air inlet layer, the zone of heating the condensation layer and the setting is stacked gradually from top to bottom on the air inlet layer, the zone of heating the condensation layer and the air inlet layer are corrugated plate structure, the zone of heating is used for supplying hot water to flow through, the condensation layer is used for supplying the sea water to flow through, the zone of heating soak in the condensation layer, seted up the inlet port on the air inlet layer, be located the below convection current formula-II type evaporation condensing unit the steam that the zone of heating produced, through be located the top the air inlet port of convection current formula-II type evaporation condensing unit rises, attached to the condensation layer, forming water droplets on the underside of the condensation layer.

Furthermore, the heating layer comprises a plurality of heat source pipes, the plurality of heat source pipes are sequentially arranged along the groove direction and then form a corrugated plate type structure together, and the corrugated fluctuation direction of the heating layer is vertical to the axial direction of the heat source pipes.

Furthermore, a heat source inlet pipe and a heat source outlet pipe are respectively arranged on two sides of the heat source pipe, the heat source outlet pipe and the heat source inlet pipe are oppositely arranged, the heat source inlet pipe is communicated with the heat source pipe, the heat source outlet pipe is communicated with the heat source pipe, and hot water flows in from the heat source inlet pipe, flows through the heat source pipe and flows out from the heat source outlet pipe.

Furthermore, a water spraying main pipe is arranged on one side edge of the condensation layer, a plurality of parallel water spraying pipes are communicated with the water spraying main pipe, one water spraying pipe corresponds to one groove of the condensation layer, one end, far away from the water spraying main pipe, of each water spraying pipe extends into the corresponding groove of the condensation layer, seawater passes through the seawater pipe and flows into the condensation layer through the seawater branch pipe, and the seawater overflows from the opposite side edge of the seawater pipe after being full of seawater.

Furthermore, the air inlet holes on each ridge of the air inlet layer are multiple, and the air inlet holes are distributed in a linear shape at the ridge.

Furthermore, a distilled water pipe is arranged on one side of the air inlet layer, a plurality of parallel distilled water collecting pipes are communicated with the distilled water pipe, one distilled water collecting pipe corresponds to one groove of the air inlet layer, and one end of each distilled water collecting pipe extends into the corresponding groove of the air inlet layer.

Furthermore, the thickness of the condensation layer and the thickness of the air inlet layer are both 1.5-3mm, and the interval between the condensation layer and the air inlet layer is 2-4 mm.

A seawater desalination device comprises the convection type-II evaporation and condensation unit, the convection type-II evaporation and condensation unit is provided with a plurality of units, the convection type-II evaporation and condensation unit is vertically arranged in a positive and negative stacking mode, hot water flows upwards from the convection type-II evaporation and condensation unit positioned below to the convection type-II evaporation and condensation unit positioned above, and seawater flows downwards from the convection type-II evaporation and condensation unit positioned above to the convection type-II evaporation and condensation unit positioned below.

The invention has the beneficial effects that: according to the convection type-II type evaporation and condensation unit or the seawater desalination device, after cold seawater enters the condensation layer, on one hand, heat is exchanged between the condensation layer and the steam to receive phase change latent heat of the steam converted into distilled water, and on the other hand, the cold seawater is heated by hot water in the heating layer.

Drawings

The invention is further illustrated by the following figures and examples.

FIG. 1 is a schematic diagram of a seawater desalination plant according to the present invention;

FIG. 2 is a partially enlarged view of the sea water desalinating apparatus shown in FIG. 1 at A;

FIG. 3 is a schematic view of the convection type-II evaporative condensing unit of the seawater desalination apparatus shown in FIG. 1;

FIG. 4 is a schematic view of the heating layer of the convective-II evaporative condensing unit shown in FIG. 3;

FIG. 5 is a schematic diagram of the structure of the condensing layer in the convective-II evaporative condensing unit shown in FIG. 3;

FIG. 6 is a schematic diagram of the structure of the inlet gas layer of the convective-II evaporative condensation unit shown in FIG. 3;

fig. 7 is a schematic view illustrating a process of desalinating seawater in the seawater desalination apparatus shown in fig. 1.

The names and the numbers of the parts in the figure are respectively as follows:

convection type-II type evaporation cold heating layer 1 heat source pipe 11

Coagulation unit 100

Heat source inlet pipe 12, heat source outlet pipe 13, heat source header pipe 14

Condensation layer 2 water spray header pipe 21

Air inlet 31 of air inlet layer 3 of spray pipe 22

Distilled water collecting pipe 32 distilled water pipe 33

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.

Referring to fig. 1 to 7, the present invention provides a seawater desalination apparatus, which includes a plurality of convection type-II evaporative condensation units 100, wherein the plurality of convection type-II evaporative condensation units 100 are vertically stacked in a positive-negative manner (referring to fig. 3, the left side of the convection type-II evaporative condensation unit 100 is an a end, the right side of the convection type-II evaporative condensation unit 100 is a B end, the a ends of two adjacent convection type-II evaporative condensation units 100 are located on the right side, and the B end is located on the left side), the convection type-II evaporative condensation unit 100 includes a heating layer 1, a condensation layer 2, and an air inlet layer 3, and the heating layer 1, the condensation layer 2, and the air inlet layer 3 are sequentially stacked from top to bottom. During operation, steam generated by the heating layer 1 of the convection type II type evaporation and condensation unit 100 positioned below rises through the air inlet layer 3 of the convection type II type evaporation and condensation unit 100 positioned above, adheres to the condensation layer 2, and forms water drops on the lower side of the groove of the condensation layer 2.

In addition, the heating layer 1, the condensation layer 2 and the air inlet layer 3 are all of corrugated plate structures, and the trends, shapes and sizes of the grooves and the ridges are consistent with each other, so that the grooves and the ridges tend to be attached together. Meanwhile, the heating layer 1 of the convection type-II type evaporation and condensation unit 100 positioned below and the air inlet layer 3 of the convection type-II type evaporation and condensation unit 100 positioned above tend to be attached together, so that the thickness of the convection type-II type evaporation and condensation unit 100 can be obviously reduced, the stacking number of layers of the convection type-II type evaporation and condensation unit 100 is effectively increased, and the utilization rate of a longitudinal space is improved.

The heating layer 1 includes a plurality of heat source tubes 11, the plurality of heat source tubes 11 are arranged in sequence along the groove direction to form a corrugated plate structure, and the corrugation direction is perpendicular to the axial direction of the heat source tubes 11. A heat source inlet pipe 12 and a heat source outlet pipe 13 are respectively arranged on two sides of the heat source pipe 11, the heat source outlet pipe 13 is arranged opposite to the heat source inlet pipe 12, the heat source pipe 11 is arranged between the heat source inlet pipe 12 and the heat source outlet pipe 13, the heat source inlet pipe 12 is communicated with the heat source pipe 11, and the heat source outlet pipe 13 is communicated with the heat source pipe 11. In operation, hot water (the flow direction of the hot water is a solid thick arrow) flows from the heat source inlet pipe 12, flows through the heat source pipe 11, flows to the heat source outlet pipe 13, and flows out into the heating layer 1 of the convection-type II evaporative condensation unit 100 located above.

In the present embodiment, the hot water flowing into the heat source pipe 11 is hot distilled water, which can prevent the clogging of the pipe due to the salt deposition. Wherein, the hot distilled water can be obtained by heat exchange between distilled water and hot seawater, or can be obtained by solar energy and industrial waste heat.

Condensation layer 2 is an upper end open-ended container, and one of them side of condensation layer 2 is higher than rather than relative side, and the higher side of condensation layer 2 is provided with spray main 21, and the intercommunication has a plurality of parallel spray pipes 22 on spray main 21, and a spray pipe 22 corresponds with the ditch groove of a condensation layer 2, and spray pipe 22 keeps away from spray main 21's one end and stretches into to the ditch inslot of the condensation layer 2 that corresponds. In operation, seawater (the flowing direction of seawater is a solid thin arrow) flows into the condensation layer 2 through the water spraying main pipe 21 and the water spraying pipe 22 along the trench, and when the seawater is full, the seawater overflows from the opposite side of the water spraying main pipe 21 and flows into the condensation layer 2 of the convection-type-II evaporative condensation unit 100 located below through the action of gravity.

In this embodiment, the water spray header pipe 21 provides a high pressure seawater after working for a predetermined period of time, the high pressure seawater has a relatively high flow rate, and the high pressure seawater flows through the water spray header pipe 21 and is then sprayed out of the water spray pipe 22, so that salt deposits on the upper surface of the condensation layer 2 in the condensation layer 2 can be cleaned, and meanwhile, salt scale on the lower side of the heating layer 1 can be washed away, and in addition, the water spray can be used for cleaning the upper side of the heating layer 1 through the gap between the heat source pipes 11. Further, since the heating layer 1 composed of the plurality of heat source tubes 11 has a certain blocking effect on the high-pressure pulse water flow, the speed of the high-pressure pulse water flow is weakened, and a certain height exists between the liquid level of the condensation layer 2 and the air inlet layer 3 of the convection type-II evaporative condensation unit 100 located above, the high-pressure pulse water flow is difficult to enter the air inlet layer 3 of the convection type-II evaporative condensation unit 100 located above, and therefore, the distilled water flowing into the air inlet layer 3 on the condensation layer 2 of the convection type-II evaporative condensation unit 100 located above cannot be salty.

Further, zone of heating 1 soaks in the liquid level of cold layer 2, namely, the top height of zone of heating 1 is less than the liquid level of cold layer 2, guaranteed that the sea water in cold layer 2 and the hot water in the heat source pipe 11 of zone of heating 1 carry out high efficiency heat exchange, the cold sea water in the cold layer 2 of flowing through rises in temperature under the heating effect of zone of heating 1, further make cold sea water be heated and evaporate, thereby produce a large amount of steam, the steam of production upwards flows and then to being located in the convection current formula-II type evaporation condensation unit 100 of top.

The air inlet holes 31 are arranged at the ridges of the air inlet layer 3, the air inlet holes 31 on each ridge are provided with a plurality of air inlet holes 31, and the air inlet holes 31 are roughly distributed in a linear shape at the ridges. And a distilled water pipe 33 is arranged on one side of the air inlet layer 3, a plurality of parallel distilled water collecting pipes 32 are communicated with the distilled water pipe 33, one distilled water collecting pipe 32 corresponds to the groove of one air inlet layer 3, and one end of each distilled water collecting pipe 32 extends into the corresponding groove of the air inlet layer 3. During operation, steam generated by the heating layer 1 of the convection type-II type evaporation and condensation unit 100 located below continuously rises after passing through the air inlet hole 31 of the convection type-II type evaporation and condensation unit 100 located above and then contacts the condensation layer 2, the steam is further cooled by cold seawater flowing through the condensation layer 2 to form distilled water, the distilled water can fall into the groove of the air inlet layer 3 along the lower side of the groove of the condensation layer 2, then the distilled water enters the distilled water collecting pipe 32 along the two ends of the groove of the air inlet layer 3, and finally the distilled water is collected to the distilled water pipe 33 through the distilled water collecting pipe 32 and then flows out.

Furthermore, the thicknesses of the condensation layer 2 and the air inlet layer 3 are both 1.5-3mm, and the interval between the condensation layer 2 and the air inlet layer 3 is 2-4mm, so that the heat transfer efficiency can be ensured, and the thickness of the whole convection type-II type evaporation and condensation unit is reduced. Meanwhile, the condensation layer 2 needs to contain a certain amount of seawater, and the heating layer 1 can be completely immersed in seawater, and the heating layer 1 and the condensation layer 2 have a separation distance of 1.5-3mm, and generally, the liquid level separation between the air inlet layer 3 of the upper convection type-II evaporative condensation unit 100 and the condensation layer 2 of the lower convection type-II evaporative condensation unit 100 is 1.5-3 mm. It is understood that the width and length of the single convection-type II evaporative condensing unit 100 can be set according to actual needs, and the material can be glass or the like.

During the use, the sea water enters into the condensation layer 2 of the convection type-II type evaporation and condensation unit 100 of top from the water spray header pipe 21 of top, and simultaneously, the sea water can wash the salt deposit in the condensation layer 2, and partly sea water is heated by the zone of heating 1 and evaporates, and partly sea water flows into the condensation layer 2 of the convection type-II type evaporation and condensation unit 100 that is located below downwards in proper order under the action of gravity, reaches and flows out from the water spray header pipe 21 in the condensation layer 2 of the convection type-II type evaporation and condensation unit 100 of bottommost finally. Meanwhile, hot water enters the heating layer 1 of the convection type-II type evaporation and condensation unit 100 at the bottom from the heat source inlet pipe 12 at the bottom, after cold seawater is heated, the hot water can flow upwards and gradually into the convection type-II type evaporation and condensation unit 100 at the upper part through the pump as power, finally enters the convection type-II type evaporation and condensation unit 100 at the top layer, and flows out from the heat source outlet pipe 13 at the top layer.

It can be understood that when the seawater flows downwards, the seawater is heated by the heating layer 1 in each convection-type II evaporative condensing unit 100, so that the temperature of the seawater rises from top to bottom layer by layer; when the hot water flows upwards, the hot water transfers heat to the seawater in the heating layer 1, so that the temperature of the hot water is reduced layer by layer from bottom to top. It will be appreciated that each convective-type II evaporative condensation unit 100 increases in temperature from top to bottom in a sequential manner, creating a significant gradient.

It should be noted that, the convection type-II type evaporation and condensation unit 100 refers to a structure formed by stacking a heating layer 1, a condensation layer 2 and an air inlet layer 3 from top to bottom, and the main difference from the convection type-I type evaporation and condensation unit is that the evaporation layer and the heat insulation layer in the convection type-I type evaporation and condensation unit are simplified.

According to the convection type-II type evaporation and condensation unit or the seawater desalination device, after cold seawater enters the condensation layer 2, on one hand, heat is exchanged between the condensation layer 2 and the steam to receive phase change latent heat of the steam converted into distilled water, and on the other hand, the cold seawater is heated by hot water in the heating layer 1.

In light of the foregoing description of preferred embodiments in accordance with the invention, it is to be understood that numerous changes and modifications may be made by those skilled in the art without departing from the scope of the invention. The technical scope of the present invention is not limited to the contents of the specification, and must be determined according to the scope of the claims.