CN102065965A

CN102065965A - Submerged evaporator

Info

Publication number: CN102065965A
Application number: CN2009801226712A
Authority: CN
Inventors: L·利亚; S·库尔基; T·里塔萨洛; J·霍尔科拉
Original assignee: Outokumpu Technology Oyj
Current assignee: Metso Outotec Oyj
Priority date: 2008-06-19
Filing date: 2009-06-17
Publication date: 2011-05-18
Anticipated expiration: 2029-06-17
Also published as: FI20080410A0; FI121163B; FI20080410A; WO2009153403A1; EA201001723A1; CN102065965B; EA018126B1

Abstract

The invention relates to a submerged evaporator, which can attenuate the surface fluctuation of the liquid in the evaporator by means of the structures positioned inside it and thus control the vibration that is generated and prevent the formation of splashes.

Description

The submergence evaporimeter

Technical field

The present invention relates to a kind of submergence evaporimeter, this submergence evaporimeter can weaken the surface wave of the liquid in the evaporimeter and the therefore vibration that produces of control and prevent to form and splash by the structure that is arranged in its inside.

Background technology

Term submergence evaporimeter is represented a kind of device, in this device, at the lower face guiding hot flue gases of the liquid that will be evaporated, therefore realizes evaporation of liquid and the product of wishing from liquid crystalization simultaneously.

Directly immersing in the evaporation, allowing to pass the liquid bubbling from the hot gas that immerses discharge of pipes.By this way, can produce the efficient transmission from gas to the liquid that is evaporated of material and heat.Owing to do not need heat exchanger, so problem of materials is not a problem.For this reason, directly immerse evaporimeter and be used in particular for chemistry and metallurgical technology, in chemistry and metallurgical technology, etching condition causes the problem relevant with material.Typically, such problem appears in heating, evaporation and the crystallization of strongly acidic solution (such as solution of metal sulfates).

In the submergence evaporimeter, immerse pipeline and be assemblied in usually in the vertical position so that minimize amount with the building material that will processed liquid directly contacts.

United States Patent (USP) 4278494 has been described a kind of submergence evaporimeter, wherein has a big pipeline that is used for supplying with hot gas.This causes the vibration of evaporimeter and splashing of liquid, and owing to this reason, evaporimeter is equipped with the connector of horizontal firing chamber and band bellows.Because the penetrability of known gas jet increases and increases along with speed, because gas can not be supplied to very high speed, therefore the amount along with gas increases, and the size of the bubble of generation also increases.When the speed of gas was low relatively, it was not absorbed it well and is fed in wherein the liquid, and this is buoyancy causes strong expansion effect in gas a reason.

United States Patent (USP) 2867972 has been described a kind of submergence evaporimeter, and this submergence evaporimeter is made every effort to minimized vibrations by make gas discharge tube engrail with saw-toothed profile.

In the scheme according to Deutsche Bundespatent 3447337, the submergence evaporimeter is operated by suction, thus, for discharge tube, only can use very little immersion depth.In this equipment, use the pipe of the separation of installing obliquely.Its shortcoming is that owing to move away from guard system during safeguarding, therefore lid must be provided with the opening of correspondingly-sized.

In the scheme according to Finnish patent 85337, gas is fed in the liquid that will be evaporated by a plurality of quite little VERTICAL TUBE.Advantage is, can be with high relatively speed supply gas, but that penetrability is still kept is little, because jet size is little.In fact, even now, weakening of fluctuation is also insufficient generally.

Summary of the invention

According to the purpose of submergence evaporation structure of the present invention is to reduce the shortcoming that occurred in the submergence evaporimeter, and such as the fluctuation in the surface level, this fluctuation brings and causes splashing and causing the further vibration of the whole evaporimeter of fluctuation of corrosion.

It is obvious that essential feature of the present invention will become in claims.

The present invention relates to a kind of submergence evaporimeter, this submergence evaporimeter comprises: cylindrical liquid container and the immersion pipeline that is connected to it, immerse pipeline by this, hot gas passes the outlet of a plurality of separation and is fed into the below on the surface of liquid via the nozzle that is connected to outlet; With surround to immerse circulating line pipeline, that be equipped with opening, make at least three radially vertical plate be fixed to the inwall of circulating line.

The quantity that is fixed to the vertical plate of circulation plates is at least 3, is preferably 4-6.The typical structure of submergence evaporimeter is to leave the gap between vertical plate and immersion pipeline, so that remove the immersion pipeline when circulating line is on the throne.

According to one embodiment of present invention, level board is connected to vertical plate, this level board be located substantially on liquid near surface but in the horizontal level of the lower face of liquid.The width of level board is preferably the 2-8% of the girth of circulating line.

According to another embodiment of the present invention, fluid box is equipped with grid, and this grid comprises two plates being arranged to be perpendicular to one another.Grid is arranged in the 2-7% of the height of the below on surface of liquid and its cylindrical part that highly is case.

Description of drawings

Fig. 1 is the schematic diagram of a scheme of prior art;

Fig. 2 is the schematic diagram of another program of prior art;

Fig. 3 is the schematic diagram that is equipped with the submergence evaporimeter of reducer according to of the present invention; And

Fig. 4 is the cross-sectional view of the submergence evaporimeter of Fig. 3.

The specific embodiment

Fig. 1 is the schematic diagram of submergence evaporimeter described in the prior, and this submergence evaporimeter comprises case 1, and this case comprises the liquid 2 and a big immersion pipeline 3 that will be evaporated, and the lower face of the liquid in case immerses pipeline by this supplies with hot gas.Liquid is fed in the case and by connector 5 by pipe jointer 4 and removes gas.The salt of crystallization is removed by the bottom of connector 6 from case.Gas jet is known to be used for obtaining negative pressure region around it, thus the solution in the peripheral region of exhaust openings especially with the jet good mixing.Effluxvelocity is big more, mixes strong more.

When using big submergence evaporimeter, must reduce gas flow speed especially so that reduce the penetrability of gas.As a result, gas is as the surface of big air bubble expansion to liquid.Shown in schematic diagram and known from practical experience, big bubble causes significant surface wave and causes the vibration of whole submergence evaporimeter.

Fig. 2 is the diagrammatic sketch of another submergence evaporator, and this submergence evaporimeter is made up of case 7 and immersion pipeline 8.The bottom of immersing pipeline comprises several pipes 9 of downward sensing, and all gas is by in the liquid 10 of these tube drainages in the case.Liquid is fed in the case by pipe jointer 11, and gas is removed by connector 12, and the salt of crystallization is removed by bottom connector 13.Surrounded by circulating line 14 by the submerged pipe system that gas separated outlet is formed, wherein aperture arrangement supplies to gas in the liquid or gas and mixtures of liquids permission and is discharged into the liquid from this circulating line in this circulating line.

In the device of Fig. 2, at first form the jet of little separation, but they tend to be combined into big jet, be formed on the bubble that upwards rises in the circulation pipe.Compare with the method for showing among Fig. 1, the advantage of this method is can use than gas flow rates high in the scheme shown in Fig. 1, and gas penetration still to be kept rationally.As a result, buoyancy is significantly less, and as other result, has the surface wave more medium and small than the situation of Fig. 1.Aspect flowing, the scheme of Fig. 2 is well, but in fact, but, the pipe of separation is not durable.

Fig. 3 and 4 describes according to submergence evaporimeter 15 of the present invention, and this submergence evaporimeter comprises cylindrical liquid case 16 and immerses pipeline 17.Be heated with evaporated liquid and be fed into by supplying with connector 18, gas is removed by gas connector 19 and the solid of crystallization is removed by discharge tube 20, and this discharge tube is connected to the conical bottom of case.A plurality of outlets 21 are formed in the bottom that enters pipeline during manufacture or by machined afterwards.By this way, be formed on the wearing and tearing of the wearing and tearing of the ducted outlet of immersion less than the pipe that separates.Circulating line 22 is arranged in and immerses around the pipeline, and is equipped with opening, and being introduced into gas in the liquid or gas and mixtures of liquids can be discharged into the liquid from described opening.

For the fluctuation on the surface of weakening liquid 23 with therefore weaken the vibration of submergence evaporimeter, at least three, preferably 4-6 vertical plate 24 is arranged in the circulating line.The quantity of vertical plate depends on the size that immerses pipeline.When this quantity is minimum of a value three, can be along both direction, promptly vertical direction and horizontal direction prevent surface wave.Vertical plate preferably radially is fixed to the inwall of circulating line and the length that they typically are circulating line.At vertical plate with immerse between the wall of pipeline and leave the gap, realize its uncrossed removing so that maintenance purpose, even circulating line is on the throne.Vertical plate can help to prevent to corrode splashing of immersion pipeline in essence and upwards rise from the surface of liquid, and prevents surface wave.

In order to make surface wave smooth, the circulating line that belongs to according to submergence evaporimeter of the present invention can also be equipped with the level board 25 that is fixed to vertical plate 24, and this level board is horizontal-extending on the both sides of vertical plate preferably.Level board be positioned at liquid near surface but below the surface of liquid.Typically the development length with vertical plate is identical for development length from the circulating line wall towards the level board that immerses pipeline.The width of level board makes it not hinder the rise of bubble in essence, and typically, the width of a level board is the 2-8% of the girth of circulating line.

The other method that weakens surface wave is outside and at the arranged beneath grid 26 on the surface of liquid 23, this grid further makes having an even surface of liquid in whole case at circulating line in submergence evaporimeter case 16.These grid comprise two plates being arranged to be perpendicular to one another.These grid typically are arranged in the horizontal level, extend to the edge of case always and have the height of about 2-7% of height of the cylindrical part of case.Grid is advantageous particularly in less evaporimeter.

It should be noted that, though Fig. 3 and 4 gives three kinds of diverse ways that have an even surface of the liquid in the submergence evaporimeter of sening as an envoy to, vertical plate can use under the situation that does not have level board or screen according to the present invention or be used in combination with the only a kind of of described structure especially.

Claims

1. a submergence evaporimeter (15), the circulating line (22) that described submergence evaporimeter comprises columniform case (16) and is connected to the immersion pipeline (17) of this columniform case and is equipped with opening, by described immersion pipeline, hot gas is supplied to via a plurality of gas separated outlets (21) below the surface, described circulating line surrounds described immersion pipeline, it is characterized in that, at least three radially vertical plate (24) be fixed to the inwall of described circulating line.

2. according to the submergence evaporimeter of claim 1, it is characterized in that the quantity of vertical plate is at least 3, is preferably 4-6.

3. according to the submergence evaporimeter of claim 1, it is characterized in that, between described vertical plate (24) and described immersion pipeline (17), leave the gap, remove described immersion pipeline with the described circulating line of box lunch (22) when on the throne.

4. according to the submergence evaporimeter of claim 1, it is characterized in that level board (25) is basically near the surface of described liquid (23) but be fixed to described vertical plate (24) in the horizontal level in the lower face of described liquid.

5. according to the submergence evaporimeter of claim 1 and 4, it is characterized in that the width of described level board (25) is the 2-8% of the girth of described circulating line (22).

6. according to the submergence evaporimeter of claim 1, it is characterized in that the case (16) that is used for the described submergence evaporimeter of liquid is equipped with grid (26), described grid comprises two grizzly bars being arranged to be perpendicular to one another.

7. according to the submergence evaporimeter of claim 1 and 6, it is characterized in that, described grid (26) is located substantially on the below on the surface of described liquid (23) basically at horizontal level, and the height of described grid is the 2-7% of height of the cylindrical part of described case (16).

8. according to the submergence evaporimeter of claim 1, it is characterized in that described gas vent (21) is formed in the bottom of described submergence evaporimeter.