CN214763353U

CN214763353U - Multi-layer film evaporator

Info

Publication number: CN214763353U
Application number: CN202120964798.7U
Authority: CN
Inventors: 马军; 宋兴刚; 刘新文; 黄毅烽
Original assignee: Guangzhou Heima Technology Co ltd
Current assignee: Guangzhou Heima Technology Co ltd
Priority date: 2021-04-14
Filing date: 2021-05-08
Publication date: 2021-11-19
Anticipated expiration: 2031-05-08
Also published as: CN113082750A

Abstract

The utility model provides a multilayer film evaporator. The water pump comprises a tray, a weir groove, an overflow baffle, a downflow pipe, a water tank, a water pump and a conveying pipe, wherein the weir groove is arranged at the upper end of one side of the tray, the downflow pipe is arranged at the lower end of the other side of the tray, the inner space of the weir groove and the inner space of the tray are separated by the overflow baffle, the downflow pipe is positioned above the water tank, one end of the conveying pipe is connected on the water tank, the other end of the conveying pipe extends into the weir groove, and the water pump is arranged on the conveying pipe. The utility model discloses a longitudinal arrangement is followed to a plurality of trays that have weir groove, overflow baffle and downcomer to drive liquid circulation flow between tray and basin, thereby found the evaporimeter that gas-liquid area of contact can infinitely enlarge, extensively be applicable to the concentration of high boiling organic solvent moisture, contain the concentration of salt waste water and industrial process such as sea water desalination. And simultaneously, the utility model discloses but automatic continuous operation, and need not manual loading and unloading feed liquid, both saved the manpower and improved the operating efficiency again.

Description

Multi-layer film evaporator

Technical Field

The utility model relates to an evaporimeter technical field, concretely relates to multilayer film evaporator.

Background

Air with low relative humidity can absorb moisture when contacting with liquid containing moisture, and part of the evaporator achieves evaporation based on the principle; in the process, the gas-liquid contact area has direct influence on the evaporation efficiency, so how to enlarge the gas-liquid contact area as much as possible is an important technical means for improving the operation efficiency of the evaporator.

The adoption of a large-area shallow container to make the liquid contact with the air flow in a spreading state is a simple and easy method for increasing the gas-liquid contact area. However, the implementation of this current technical route is cumbersome, and it is necessary to load the liquid into the tray and pour out the remaining liquid from the tray after the water is evaporated, which not only makes the operation complicated, but also makes it impossible to continuously operate, and it is time-consuming and laborious to load and unload the liquid manually.

Disclosure of Invention

The utility model discloses aim at to prior art's technical defect, provide a multilayer film evaporator to solve the technical problem that conventional tray formula evaporator operation is complicated, unable continuous operation, and need artifical loading and unloading feed liquid.

In order to realize the technical purpose, the utility model adopts the following technical scheme:

multilayer film evaporator, including the tray, the weir groove, the overflow baffle, the downcomer, the basin, the water pump, the conveyer pipe, wherein, be equipped with the weir groove in one side upper end of tray, be equipped with the downcomer at the opposite side lower extreme of tray, the inner space in weir groove passes through overflow baffle looks interval with the inner space in tray, the downcomer is located the basin top, the one end of conveyer pipe is connected on the basin, the other end of conveyer pipe extends to the weir groove in, be equipped with the water pump on the conveyer pipe.

Preferably, there are several trays, several trays are arranged along the longitudinal direction, and for the adjacent trays, the lower water flow pipe of the tray positioned above extends into the weir trough of the tray positioned below.

Preferably, the downstream water pipe of the lowermost tray is held above the water trough, and the other end of the conveying pipe extends into the weir trough of the uppermost tray.

Preferably, the height of the tray is no greater than 50 mm.

Preferably, the liquid flows in the tray, and spreads on the tray as a thin film evaporation surface.

Preferably, the tray further comprises an air supply mechanism, and the air supply direction of the air supply mechanism is parallel to the bottom surface of the tray.

In the above technical scheme, the tray is preferably of a square structure, and the length and the width are arbitrary.

The utility model adopts the tray with the weir groove and the overflow baffle, and the weir groove and the overflow baffle ensure that the liquid is evenly distributed on the tray to form a film evaporation surface; the liquid flowing continuously reaches another tray below through the downflow pipe, so that the film evaporation surface continuously extends on the plurality of trays arranged longitudinally; the liquid settled in the water tank flows back to the weir trough at the top through the conveying pipe under the action of the water pump, and the evaporation effect is achieved by the way of reciprocating. The trays are longitudinally arranged from top to bottom, and the number of the trays can be determined according to the required evaporation area. Air with low relative humidity flows over the surface of the tray and contacts with the liquid containing water to evaporate the water, so as to concentrate the liquid.

The utility model provides a multilayer film evaporator, this technical scheme adopt a plurality of trays that have weir groove, overflow baffle and downcomer to follow longitudinal arrangement to drive liquid circulation between tray and basin flows, thereby has found the evaporimeter that gas-liquid area of contact can infinitely enlarge, extensively be applicable to the concentration of high boiling organic solvent moisture, contain industrial process such as concentration and seawater desalination of salt waste water. And simultaneously, the utility model discloses but automatic continuous operation, and need not manual loading and unloading feed liquid, both saved the manpower and improved the operating efficiency again.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic structural diagram of a heat pump type seawater desalination apparatus in embodiment 1 of the present invention;

FIG. 3 is a schematic diagram of the operation of concentrating salt-containing wastewater by using an industrial heat source in embodiment 3 of the present invention;

in the figure:

1. tray 2, film evaporation surface 3, weir notch 4, overflow baffle

5. A down flow pipe 6, a water tank 7, a water pump 8 and a delivery pipe

9. Compression type refrigeration compressor 10, refrigeration compressor 11, refrigeration compressor condenser 12 and refrigeration expansion valve

13. An air heating heat exchanger 14 and an air cooling heat exchanger.

Detailed Description

The following will describe in detail specific embodiments of the present invention. Well-known structures or functions may not be described in detail in the following embodiments in order to avoid unnecessarily obscuring the details. Approximating language, as used herein in the following examples, may be applied to identify quantitative representations that could permissibly vary in number without resulting in a change in the basic function. Unless defined otherwise, technical and scientific terms used in the following examples have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

The multilayer film evaporator, as shown in fig. 1, includes tray 1, weir notch 3, overflow baffle 4, downflow pipe 5, basin 6, water pump 7, delivery pipe 8, wherein, be equipped with weir notch 3 on one side upper end of tray 1, be equipped with downflow pipe 5 at the opposite side lower extreme of tray 1, the inner space of weir notch 3 passes through overflow baffle 4 looks interval with the inner space of tray 1, downflow pipe 5 is located above basin 6, the one end of delivery pipe 8 is connected on basin 6, the other end of delivery pipe 8 extends to in weir notch 3, be equipped with water pump 7 on delivery pipe 8.

Wherein, a plurality of trays 1 are arranged along the longitudinal direction, and for the adjacent trays 1, the lower water flow pipe 5 of the tray 1 positioned above extends into the weir notch 3 of the tray 1 positioned below. The lower water flow pipe 5 of the lowermost tray 1 is held above the water trough 6, and the other end of the delivery pipe 8 extends into the weir trough 3 of the uppermost tray 1.

The height of the tray 1 is not more than 50 mm. When the feed liquid flows in the tray 1, the feed liquid spreads on the tray 1 to form a film evaporation surface 2. The tray is characterized by further comprising an air supply mechanism, and the air supply direction of the air supply mechanism is parallel to the bottom surface of the tray 1.

The evaporator has the following structural characteristics: the tray 1 with the weir notch 3 and the overflow baffle 4 is adopted, and the weir notch 3 and the overflow baffle 4 enable liquid to be uniformly distributed on the tray 1 to form a film evaporation surface 2; the liquid flowing continuously reaches another tray 1 below through a downflow pipe 5, so that the film evaporation surface 2 continuously extends on the plurality of trays 1 arranged longitudinally; the liquid settled in the water tank 6 flows back to the uppermost weir notch 3 through the conveying pipe 8 under the action of the water pump 7, and the evaporation effect is achieved by the way of reciprocating. A plurality of trays 1 are arranged longitudinally from top to bottom, the number of which can be determined according to the evaporation area required. Air with low relative humidity flows over the surface of the tray 1 and contacts with the liquid containing moisture to evaporate the moisture, thereby achieving the purpose of concentrating the liquid.

Example 1

A heat pump type seawater desalination device, as shown in fig. 2: reference numeral 9 is a compression type refrigeration compressor, reference numeral 10 is a refrigeration compressor, reference numeral 11 is a refrigeration compressor condenser, and reference numeral 12 is a refrigeration expansion valve. Reference numerals 9 to 12 constitute a complete refrigeration system.

In operation, air of low relative humidity heated by the refrigeration condenser passes through the multi-layer thin film evaporator, fully contacts with the water-containing liquid to absorb water, then passes through the refrigeration evaporator, and the water in the air is condensed when passing through the refrigeration evaporator, thereby obtaining purified water from the lower part of the refrigeration evaporator. The seawater desalination device combining the multilayer thin film evaporator and the heat pump is adopted, 4-5 kilograms of fresh water can be generated by electricity every kilowatt hour, and the seawater desalination device is particularly suitable for providing fresh water for islands.

Example 2

Concentration of DMAc-containing wastewater:

the production process of the filtering membrane produces a certain amount of waste water containing DMAc, the concentration of the waste water is usually between 5 and 10 percent, the COD value exceeds the national emission standard, but the investment and the operation cost are not acceptable by adopting a rectification method.

Adopt the utility model discloses the waste water that preliminary treatment contains DMAc can realize resourceful treatment.

The procedure was carried out analogously to example 1, by circulating the DMAc-containing waste water through the multilayer film evaporator of the invention using a water pump.

Through the utility model discloses can obtain after the processing containing DMAC volume and be less than 2% waste water, and the waste water about DMAc concentration 60%. The wastewater containing less than 2 percent of DMAC can be recycled, and the wastewater containing DMAc60 percent can be sent to a professional manufacturer for rectification and purification.

The device is used for treating the DMAc-containing wastewater, so that zero discharge is realized, and the high-concentration DMAc waste liquid obtained by concentration can bring economic benefits to enterprises. The power required for each 1 ton of 10% strength wastewater treatment is approximately 100 yuan, and the resulting concentrated DMAc yields a basic estimated gain approaching 2000 yuan.

Example 3

Concentrating high-salt wastewater:

industrial production produces large amounts of waste water containing salts, and separation of salts from waste water is important due to the poor biochemical properties of various high-salt waste waters.

In addition, industrial production can produce a large amount of low temperature heat sources with the temperature of 60-90 ℃, and the device can be used for concentrating the salt-containing wastewater by utilizing the low temperature heat sources.

The principle is shown in fig. 3. In the figure, reference numeral 13 is an air heating heat exchanger, and the function of the component is to heat air by using industrial waste heat, so that the air has the function of absorbing moisture; in the figure, reference numeral 14 denotes an air-cooling heat exchanger for cooling air with low-temperature water, and moisture in the air is converted into condensed water by cooling.

In operation, air is heated by the air heating heat exchanger 13, then moisture is absorbed by the multi-layer thin film evaporator, and finally moisture in the air is condensed by the air cooling heat exchanger 14. Thereby, the salt-containing wastewater in the multi-layer thin film evaporator is concentrated. The water obtained from the air cooler, which is salt-free, can be further treated using conventional water treatment methods.

The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention, and is not intended to limit the present invention. Any modification, equivalent replacement, and improvement made within the scope of the present invention should be included in the protection scope of the present invention.

Claims

1. Multilayer film evaporator, its characterized in that includes tray (1), weir groove (3), overflow baffle (4), lower downcomer (5), basin (6), water pump (7), conveyer pipe (8), wherein, be equipped with weir groove (3) in one side upper end of tray (1), be equipped with downcomer (5) at the opposite side lower extreme of tray (1), overflow baffle (4) looks interval is passed through to the inner space of weir groove (3) and tray (1), downcomer (5) are located basin (6) top, the one end of conveyer pipe (8) is connected on basin (6), the other end of conveyer pipe (8) extends to in weir groove (3), be equipped with water pump (7) on conveyer pipe (8).

2. The multilayer thin film evaporator according to claim 1, characterized in that there are several trays (1), several trays (1) being arranged in longitudinal direction, and that for adjacent trays (1) the lower water flow tube (5) of the tray (1) located above extends into the weir trough (3) of the tray (1) located below.

3. The multilayer thin film evaporator according to claim 2, characterized in that the lower water flow tube (5) of the lowermost tray (1) is held above the water trough (6), and the other end of the delivery tube (8) extends into the weir trough (3) of the uppermost tray (1).

4. The multilayer thin film evaporator according to claim 1, characterized in that the height of the tray (1) is not more than 50 mm.

5. The multilayer thin film evaporator according to claim 1, characterized in that the thin film evaporation surface (2) is spread in the tray (1) while the feed liquid flows in the tray (1).

6. The multilayer thin film evaporator according to claim 1, further comprising a blowing mechanism whose blowing direction is parallel to the bottom surface of the tray (1).