CN200942302Y

CN200942302Y - Multi-effect evaporation and desalt condensation device

Info

Publication number: CN200942302Y
Application number: CNU2006201136090U
Authority: CN
Inventors: 周堃
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-04-30
Filing date: 2006-04-30
Publication date: 2007-09-05
Anticipated expiration: 2016-04-30

Abstract

The utility model discloses a multiple-effect evaporation, concentration and desalination device, which comprises multiple-effect evaporators connected mutually; each multiple-effect evaporator consists of a set or multi-set plate type evaporation units; a concentrated solution in the evaporation tank of each evaporation unit is connected with a next effect evaporation unit in the same set through a pipeline; the concentrated solution in each effect and multi-set evaporation unit also can be collected together and sent to the next effect. The utility model has the advantages that the evaporation unit is modularized, the heat transmission efficiency is high, not easy to encrust and suitable for dual-purpose of desalination and concentration.

Description

A kind of multiple-effect evaporation desalination enrichment facility

Technical field

The utility model relates to a kind of multiple-effect evaporation desalination enrichment facility, and particularly a kind of employing is the preheating solution to be concentrated step by step, organizes the plate evaporation unit module more, and plate-type evaporator adopts plate edge air inlet, advances the device of concentrate.Can be widely used in that desalinization concentrates, saline sewage desalination concentration.

Background technology

At present, the device that existing in the world multiple-effect evaporation concentrates adopts mostly and rises film or falling liquid film method and tubular type vaporising device.Its shortcoming is:

1. tubular evaparator manufacturing process complexity, manufacturing cost is higher; The tube wall surface fouling, the cleaning difficulty.

2. no matter be Natural Circulation or forced circulation in the climbing-film evaporation, because the tubular evaparator structure is limit, liquid level is higher, and consequent liquid level pressure makes the concentrate boiling temperature raise, and has reduced heat transfer temperature difference between each effect, reduces heat exchange efficiency.

3. in the falling film evaporation, concentrate forms film at tube wall surface, and when concentrate concentration was higher, tube wall surface very easily formed crystallization or fouling, influences heat exchange.

Present plate-type evaporator is owing to adopt the plate planar ends to establish air inlet, inlet.Steam inlet and concentrate inlet-duct area are very little, and flow is limited, can only be used for single effect evaporation, and concentrated solution discharge is little simultaneously, flow velocity is low, easy fouling.

Summary of the invention

The purpose of this utility model is to provide a kind of multiple-effect evaporation desalination enrichment facility, and to solve manufacturing, maintenance, the maintenance complexity that prior art exists, manufacture difficulty is big, cost is high, and the low problem of heat transfer efficiency.

The utility model is achieved in that and comprises interconnective multi-effect evaporator that every single-effect evaporator is made up of one or more groups plate evaporation unit.Concentrate in the evaporation tank of every group of evaporation element, imitating on the same group by pipeline and next, evaporation element links to each other; After the concentrate that also every effect how can be organized evaporation element compiles, deliver to next effect.

Described plate evaporation unit is immersed in the evaporation tank by one or more plate-type evaporators and forms.

Described plate-type evaporator, its steam inlet and concentrate import are located at the edge side of plate.

The utility model possesses following characteristics:

1. apparatus structure modularization, available identical evaporation element module combinations become the multiple-effect of different output scale to concentrate desalting plant, design, make, maintenance is simpler, has interchangeability, be fit to large-scale production, thereby reduce manufacturing cost.

2. alleviate equipment corrosion.Because high concentration is imitated at low temperature, low concentration is imitated at high temperature, therefore the corrosion that has alleviated equipment.

3. because plate type heat exchanger adopts the admission of plate edge side, feed liquor, increased area of passage and flow, the steam pressure that reduces to cause because of steam resistance loses, simultaneously, alleviated crystallization, the fouling of concentrate on plate, making the plate-type heat-exchange mode use in multiple-effect evaporation becomes possibility.

4. heat transfer efficiency height.Because adopt plate-type evaporator to improve heat transfer coefficient, heat transfer efficiency greatly improves than tubular evaparator.

Description of drawings

Fig. 1 is an overall formation schematic diagram of the present utility model;

Fig. 2 is the formation schematic diagram of the utility model evaporation element;

Fig. 3 is the formation schematic diagram of the utility model plate-type evaporator.

Description of symbols in the accompanying drawing: 1, cooling water inlet, 2, coolant outlet, 3, concentrate pump, 4, desalination water (coagulating water) pump, 5, solution to be concentrated (feed liquid) pump, A, evaporation element, B, plate-type evaporator, C, evaporation tank, D, dense water preheater, E, fresh water preheater, F, sealing strip, G, back-up block, L, concentrate import, M, heating steam import, N, indirect steam outlet, O, concentrated solution outlet, P, coagulate water out, T, first is imitated, and U, second is imitated, V, the most last effect, X, X plate, Y, Y plate.

The specific embodiment

Referring to Fig. 1, the utility model is to be a separate unit with every effect; Steam between every effect, concentrate and fresh water are connected with pipeline.

Every effect is made up of single or multiple evaporation element A (every effect shown in this figure is three evaporation elements); Every effect all is furnished with independent dense water preheater D and fresh water preheater E, is used for preheating solution to be concentrated step by step.

Referring to Fig. 1 and Fig. 2, each evaporation element A is made up of single or multiple plate-type evaporator B (every evaporation element shown in this figure is three plate-type evaporators), and is immersed among the evaporation tank C.

Referring to Fig. 3, plate-type evaporator B of the present utility model is by two kinds of plates (X plate and Y plate) mutual alternately laminated composition.

Form vapor chamber between X plate and the Y plate, steam is emitted heat here and is condensed into water with fixed attention.

Form between Y plate and the X plate and concentrate sap cavity, because plate-type evaporator integral body is immersed in the concentrate of evaporation tank C, concentrate enters between Y plate and X plate, and is gone out indirect steam by vapor chamber by the heat heating evaporation that plate transmits, and itself is concentrated.

The plate edge is provided with sealing strip F and back-up block G, and sealing strip F assurance vapor chamber and concentrated sap cavity are not connected; The gap of back-up block G guarantees steam, coagulates the unimpeded mobile of water or concentrate.

The course of work of the present utility model is as follows:

1. solution to be concentrated feed process: solution to be concentrated enters preheating in above each fresh water preheater of imitating and the dense water preheater successively by the most last effect (lowest temperature effect) V, through preheating, enters first at last and imitates evaporation tank.

2. concentrate flow process: enter first and imitate T and imitate in the plate-type evaporator of evaporation tank by external heat source steam (or hot water) evaporation first, concentrate through the solution to be concentrated of preheating, become concentrate and indirect steam, be concentrated liquid enters the second effect U by pipeline, dense water preheater evaporation tank.All go up one and imitate lowly because second imitates the evaporation tank temperature, pressure, imitate two therefore that shwoot goes out the fraction steam in the evaporation tanks, itself temperature is reduced to two and is imitated evaporating temperatures, imitates in the evaporation tanks two simultaneously and is imitated the plate-type evaporator evaporation and concentration by two.The two thermal source steam of imitating plate-type evaporator are imitated the indirect steam that evaporates from first.The rest may be inferred for each effect later on, imitates V until the last.Concentrate is concentrated by the most last effect by stepped evaporation and extracts out through concentrate pump 3.

3. steam and current journey with fixed attention: external heat steam enters first and imitates the plate-type evaporator vapor chamber, emits heat, and the first concentrate heating evaporation of imitating evaporation tank is gone out indirect steam, and itself condenses into water; Emit the part heat through the fresh water preheater of this effect again, enter next and imitate the fresh water preheater.

The vapor chamber that the indirect steam that is evaporated by the first effect plate-type evaporator enters the second effect plate-type evaporator, emit heat, the second concentrate heating evaporation of imitating in the evaporation tank is gone out indirect steam, itself condense into coagulating of the water and first effect and enter next effect fresh water preheater after water converges.Below each imitates that the rest may be inferred, until the last effect.All coagulate water and all extract out, as desalination water by condensate pump 4.

The utility model has overcome many defectives that original tubular type multiple-effect evaporation desalination concentrates, and is the ideal device that a new generation's evaporation desalination concentrates.

Claims

1. a multiple-effect evaporation desalination enrichment facility comprises interconnective multi-effect evaporator, and it is characterized in that: described each single-effect evaporator is made up of one or more groups plate evaporation unit; Concentrate in the evaporation tank of every group of evaporation element, imitating on the same group by pipeline and next, evaporation element links to each other; After the concentrate that also every effect how can be organized evaporation element compiles, deliver to next effect.

2. multiple-effect evaporation desalination enrichment facility according to claim 1, it is characterized in that: described plate evaporation unit is immersed in the described evaporation tank by one or more plate-type evaporators to be formed.

3. multiple-effect evaporation desalination enrichment facility according to claim 2, it is characterized in that: the steam inlet of described plate-type evaporator and concentrate import are located at the edge side of plate.