CN102008829B - Multi-effect vacuum forced circulation evaporation device and material concentrating method thereof - Google Patents

Multi-effect vacuum forced circulation evaporation device and material concentrating method thereof Download PDF

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Publication number
CN102008829B
CN102008829B CN2010102975811A CN201010297581A CN102008829B CN 102008829 B CN102008829 B CN 102008829B CN 2010102975811 A CN2010102975811 A CN 2010102975811A CN 201010297581 A CN201010297581 A CN 201010297581A CN 102008829 B CN102008829 B CN 102008829B
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effect
vacuum
forced
circulation
valve
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CN102008829A (en
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孙家隆
吴学文
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WENZHOU TIANLONG LIGHT INDUSTRY EQUIPMENT Co Ltd
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WENZHOU TIANLONG LIGHT INDUSTRY EQUIPMENT Co Ltd
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Abstract

The invention discloses a multi-effect vacuum forced circulation evaporation device, belonging to the field of evaporation devices. The multi-effect vacuum forced circulation evaporation device comprises at least two forced circulation evaporators, a condensate drain device and a vacuumizing device, wherein the vacuumizing device is communicated with the forced circulation evaporator and the condensate drain device through pipelines; and a feed valve is arranged on a feed pipeline of the forced circulation evaporator of each effect and is used for controlling the feeding of feed liquid. In the invention, the vacuumizing device is used for realizing the vacuum feeding process of the evaporators, and meanwhile, the feed valve and an emptying valve are arranged on each evaporator of one effect; by means of a mode of closing a vacuum pump, opening the feed valves of the double-effect evaporators and simultaneously opening the emptying valve of the evaporator of the secondary effect, materials of the secondary effect can be absorbed into the primary effect and then are continuously heated and evaporated, and the materials are discharged through a forced circulation pump after the material concentration meets requirements after circulation evaporation. The multi-effect vacuum forced circulation evaporation device is suitable for various evaporators and also suitable for concentrating equipment for various organic solvents.

Description

The method of a kind of vacuum multiple-effect forced-circulation evaporation device and concentrated material thereof
Technical field
The invention belongs to the evaporimeter field, relate in particular to a kind of multi-effect evaporating device that utilizes the vacuum input and output material.
Background technology
At present, evaporimeter is widely used in fields such as chemical industry, pharmacy, food.Multiple-effect forced-circulation evaporation device is that several evaporimeters couple together operation, and the indirect steam that is produced during evaporation in the preceding 1st effective evaporator is as the heating steam of back 1st effective evaporator.Owing to repeatedly reused heat energy, reduced the heat energy consumption significantly, between the evaporimeter of each effect and heater, be provided with forced circulation pump simultaneously, improve material through flow velocity, so multiple-effect evaporation helps producing continuously in a large number.
Existing multiple-effect forced-circulation evaporation device generally includes a few effect heaters and vaporization chamber, and gas-liquid separator, condenser, feed pump, discharging pump, vavuum pump and drainage arrangement.Material gets into each through feed pump and imitates heater, through forced circulation pump circulating and evaporating between heater and evaporimeter, treat that material concentration reaches desired concn after, through discharging pump material is discharged; The liquid that the condensation of steam through the afterbody vaporization chamber through condenser becomes liquid and flow out through the afterbody heater is discharged after outputing to drainage arrangement jointly.In order to reduce the material boiling point, to increase work efficiency, evaporimeter generally carries out work under vacuum state.The input and output material process of existing evaporimeter needs to realize that with feed pump and discharging pump production cost is high respectively, and it is slow to pass through the feed pump charging rate, and during through the discharging pump discharging, the discharging proportion of each single-effect evaporator is different, and consistency of product is poor.
Chinese patent CN2391876Y discloses a kind of forced-circulation evaporation device that is used to produce calcium lactate, and that this device comprises is at least one, two imitate the forced evaporation devices; Each forced evaporation device all is provided with feed pipe, and said feed pipe communicates with charge pump, elevated bunker; Circulation pipe all is provided with discharging opening in every single-effect evaporator, all communicates with discharging pump.Feed liquid by preceding workshop section at first gets in the elevated bunker, sends into respectively in each single-effect evaporator via charge pump, through forced circulation; Feed liquid reaches desired concn; One imitates, and two imitate feed liquid can directly enter stock chest, treats that the triple effect feed liquid reaches desired concn; Unlatching triple effect discharging pump is counter to be sent in the two effect evaporator tanks, finally imitates heating back dischargings by two.The input and output material of this device feeds in raw material and discharge with charge pump and discharging pump respectively, simultaneously, and when this device passes through the discharging pump discharging; One imitates and the direct discharge of 2nd effect evaporator; Because it is different that an effect, two is imitated the discharging proportions, homogeneity of product is poor, can not reach the production requirement of product.
Summary of the invention
Technical problem to be solved by this invention is that multi-effect evaporating device discharging homogeneity of product of the prior art is poor, in the discharging of the charging simultaneously process feed pump and discharging pump need be set, and equipment cost is high, baroque problem.
For realizing above-mentioned purpose; The invention provides a kind of vacuum multiple-effect forced-circulation evaporation device; Comprise multiple-effect forced-circulation evaporation device and the vacuum extractor that is used to extract gas in the multiple-effect forced-circulation evaporation device; Said multiple-effect forced-circulation evaporation device comprises: the charging house steward, and said charging house steward is provided with a charging main valve; At least two imitate the forced-circulation evaporator that is communicated with successively; Every effect forced-circulation evaporator comprises the heater that is communicated with the charging house steward, through the vaporization chamber that circulation pipe is communicated with said heater, the forced circulation pump that is communicated with said circulation pipe, and the discharging opening that is arranged on said circulation pipe bottom; Vaporization chamber top in the last effect forced-circulation evaporator is provided with steam outlet, and the heater of imitating forced-circulation evaporator through pipeline and back one links to each other; The condensation pumping equipment is communicated with last steam outlet of imitating the vaporization chamber top of forced-circulation evaporator, is used for steam condensation and discharging; Be provided with the vacuum control valve that is used to control the vacuum extractor break-make between said vacuum extractor and the said multiple-effect forced-circulation evaporation device; The feed pipe of the forced-circulation evaporator of said each effect is provided with inlet valve, is used to control the turnover of feed liquid; The forced-circulation evaporator of said each effect is provided with the blowdown piping that is communicated with atmosphere, and said blowdown piping is provided with the atmospheric valve of control piper break-make.
Said multiple-effect forced-circulation evaporation device comprises gas-liquid separation device, imitates forced-circulation evaporator with said last and is communicated with, and realizes the discharge of the liquid-vapor mixture in the heater; The import of said gas-liquid separation device is connected with last heater of imitating forced-circulation evaporator; Receive the gas liquid mixture of said heater; Said gas-liquid separator top is located in the outlet one tunnel of said gas-liquid separator; Be connected through the condenser of indirect steam pipeline with said condensation pumping equipment, the one road is located at said gas-liquid separator bottom, is communicated with the pumping equipment of said condensation pumping equipment.
Said condensation pumping equipment comprises condenser; The upper end of said condenser is communicated with vacuum chamber, and said vacuum chamber imitates the forced-circulation evaporator steam outlet with said last and said vacuum extractor is communicated with; Receive flow container, its upper end is communicated with said condenser and said water separator; Pumping equipment, said pumping equipment is communicated with the said flow container that receives, and discharged by the condensate liquid in the flow container with said; Said pumping equipment comprises self-priming positive displacement pump; The import of said self-priming positive displacement pump communicates through being connected pipeline with the said liquid outlet of flow container that receives, and said fluid pipeline is provided with inlet check valve; Said self-priming discharge opeing delivery side of pump is through fluid pipeline and atmosphere; Said fluid pipeline is provided with outlet non-return valve, and said inlet check valve is provided with direction and is used for preventing that liquid from flowing into the said flow container that receives, and outlet non-return valve is provided with direction and is used for preventing that liquid from flowing back to said self-priming positive displacement pump.
Said vacuum control valve is arranged at said vacuum chamber and said last imitated on the pipeline between the forced-circulation evaporator steam outlet.
The bottom of the input duct of the said forced circulation pump of every effect is provided with vacuum sampler, and said vacuum sampler comprises logical material valve, blow-off valve and is connected in the sample box between logical material valve and the blow-off valve; Said logical material valve and blow-off valve are controlled the break-make of said vacuum sampler.
Connecting pipeline between said heater of every effect and the said vaporization chamber of every effect is to get into said vaporization chamber along said vaporization chamber inwall tangential.
Be provided with stainless steel cloth in the steam discharge pipe of the said vaporization chamber of every effect top.
Said vaporization chamber is provided with visor and following visor, and said visor down is arranged in the said vaporization chamber, and on the heater spray mouth center line 100-150mm; The said distance that goes up visor under the visor distance is more than 0.5 meter or is positioned at the vaporization chamber side top.
The present invention provides a kind of method that vacuum multiple-effect forced-circulation evaporation device concentrates material of using simultaneously, it is characterized in that: may further comprise the steps,
A. vacuum feed: the open vacuum pump, open vacuum control valve after, open the inlet valve of charging main valve and each single-effect evaporator, treat that material reaches entry level after, close the charging main valve, accomplish fill process;
B. concentration and evaporation circulates: open forced circulation pump, the material of each single-effect evaporator begins circulating and evaporating;
C. discharging:
1) when the concentration of multi-effect evaporator material reaches requirement respectively, closes vacuum control valve, open the atmospheric valve of every single-effect evaporator, open forced circulation pump respectively, material is discharged respectively through discharging opening;
When 2) current 1st effective evaporator material concentration reaches requirement then the concentration of 1st effective evaporator material does not reach requirement, close vacuum control valve, the atmospheric valve of 1st effective evaporator is opened last effect forced circulation pump before opening, and through discharging opening last effect material is discharged; Treat that last effect material drains, open vacuum control valve, the inlet valve of two effects before and after opening is opened the atmospheric valve that imitate back one, and the material of back 1st effective evaporator behind the 1st effective evaporator, is closed the atmospheric valve of last effect inlet valve and back 1st effective evaporator before the charging house steward sucks; Open the forced circulation pump circulating and evaporating, after concentration reaches requirement, material is discharged;
The steam that said process produces is discharged through self-priming positive displacement pump after the condensation of condensation pumping equipment.
The steam of 1st effective evaporator gets into via the vapour-discharge tube road in the tubulation of heater of back 1st effective evaporator before among the said step b.
The described material concentration of step c is to detect through vacuum sampler to obtain.
The described entry level of step a is the distance downward 300-400mm in visor center down.
The present invention has following advantage:
1, the present invention has realized the charging of vaporising device through the vacuum of vavuum pump, has saved a feed pump, has reduced production cost, and charging rate improves.Because as thermal source, compare last effect and reduce by the evaporation efficiency that imitate back one with the steam of last effect for an effect behind the multi-effect evaporating device, ordinary circumstance bottom discharge concentration is different; Homogeneity of product is poor, and the present invention is provided with inlet valve, atmospheric valve at each single-effect evaporator, through closing vavuum pump; The inlet valve of opening the two-effect evaporation device is opened the mode of the atmospheric valve of back 1st effective evaporator simultaneously, after the material of can back one imitating sucks an effect continued heating evaporation, after material concentration reaches requirement after the circulating and evaporating; Through forced circulation pump material is discharged; Homogeneity of product is improved, has saved discharging pump simultaneously, reduced production cost.
2, the connecting pipeline between heater of the present invention and the vaporization chamber is to get into said vaporization chamber along said vaporization chamber inwall tangential, when material sprays, cuts through rotation along the vaporization chamber inwall; Can alleviate the impact of material to vaporization chamber; Naturally rotate after making material get into vaporization chamber, and form whirlpool, eliminate most of foam; And materials such as solid and powder are evenly distributed, prevent deposition.
3, vacuum liquid sampler of the present invention is made up of two ball valves and the sample box between two ball valves; Valve above under vacuum state, opening, material can get in the sample box automatically, closes top ball valve; Open following ball valve; Can emit the material of sample box, need not discharge vacuum, convenient sampling.
Description of drawings
Shown in Figure 1 is the structure chart that vacuum two is imitated the forced-circulation evaporation device;
Shown in Figure 2 is the vertical view that vacuum two is imitated the forced-circulation evaporation device;
Shown in Figure 3 is the structural representation of vacuum sampler.
Reference numeral is expressed as among the figure:
1; 1 '-heater 2; 2 '-vaporization chamber 3-forced circulation pump 4-condensing unit 5-drainage arrangement 6-vacuum chamber 7-vacuum sampler 8-gas-liquid separator 9-vacuum extractor 10-goes up visor 20-charging house steward 21-circulation pipe 22-discharging opening 23 under the visor 11-; 23 '-steam outlet 30; 30 '-inlet valve 31,31 '-atmospheric valve 32-vacuum control valve 33-charging main valve 40-forced-circulation evaporator 41-condensation pumping equipment 51-receive the self-priming positive displacement pump 53-of flow container 52-to connect the logical material of pipeline 54-inlet check valve 55-fluid pipeline 56-outlet non-return valve 71-valve 72-sample box 73-blow-off valve
The specific embodiment
Below will combine accompanying drawing, and use following examples that the present invention is further set forth.
Embodiment 1
Fig. 1, shown in Figure 2 is the structure chart that vacuum two is imitated the forced-circulation evaporation device, with reference to Fig. 1, this device comprises that two imitate forced-circulation evaporation device and the vacuum extractor 9 that is used to extract gas in the multiple-effect forced-circulation evaporation device.Said forced-circulation evaporation device comprises two circulating evaporators; Each forced-circulation evaporator all comprises the heater 1 that is communicated with charging house steward 20; The vaporization chamber 2 and the forced circulation pump 3 that are communicated with said heater 1 through circulation pipe 21, and the discharging opening 22 that is arranged on the circulation pipe bottom; Vaporization chamber 2 ' top in the said effect forced-circulation evaporator is provided with steam outlet 23, and the heater 1 ' of imitating forced-circulation evaporators through pipeline and two links to each other.Said vaporization chamber 2; 2 ' top is provided with stainless steel cloth; Because the cylindrical shell of vaporization chamber 2 is than higher, frothy material rotates the foam that disappears through jib, and most of foam cleans; The material that bubbles especially easily can not rotate through indirect steam naturally removes all foams, can remove foam fully through said stainless steel cloth.Said vaporization chamber is provided with visor 10 and following visor 11.Through observing visor 11 down, confirm the suction head of material during charging, last visor 10 is used to observe the degree of vaporization chamber inner foam.Said down visor 11 is arranged in the said vaporization chamber, and apart from heater spray mouth center line upper end 100-150mm; The said distance that goes up visor 11 under visor 10 distances is more than 0.5 meter or is positioned at the vaporization chamber side top.
Said charging house steward 20 is provided with a charging main valve 33, is arranged at the upper reaches of the inlet valve 30 of an effect forced-circulation evaporator.The forced-circulation evaporator 40 of a said effect is provided with the blowdown piping that is communicated with atmosphere; Said blowdown piping is provided with the atmospheric valve 31 of control piper break-make; The forced-circulation evaporator of two effects is provided with the blowdown piping that is communicated with atmosphere, and said blowdown piping is provided with the atmospheric valve 31 ' of control piper break-make.The feed pipe of a said effect forced-circulation evaporator is provided with inlet valve 30, is used to control the entering of feed liquid.The feed pipe of two effect forced-circulation evaporators is provided with inlet valve 30 ', is used to control the entering of feed liquid.With reference to Fig. 2, the connecting pipeline between said heater 1 and the vaporization chamber 2 is to get into said vaporization chamber along said vaporization chamber inwall tangential.When material sprays, cut through rotation, can alleviate the impact of material, make material get into rotation naturally behind the vaporization chamber, and form whirlpool, eliminate most of foam, and materials such as solid and powder are evenly distributed, prevent to precipitate vaporization chamber along the vaporization chamber inwall.
This forced-circulation evaporation device also comprises condensation pumping equipment 41, and condensation pumping equipment 41 comprises condenser 4; The upper end of said condenser 4 is communicated with vacuum chamber 6, and said vacuum chamber 6 is imitated forced-circulation evaporator steam outlet 23 ' with said last and is communicated with said vacuum extractor 9; Receive flow container 51, its upper end is communicated with said condenser 4 and said water separator 8; Pumping equipment, said pumping equipment is communicated with the said flow container 51 that receives, and discharged by the condensate liquid in the flow container 51 with said; Said pumping equipment comprises self-priming positive displacement pump 52; The import of said self-priming positive displacement pump 52 communicates through being connected pipeline 53 with the said liquid outlet of flow container 51 that receives, and said fluid pipeline 55 is provided with inlet check valve 54; The outlet of said self-priming positive displacement pump 52 is through fluid pipeline 55 and atmosphere; Said fluid pipeline 55 is provided with outlet non-return valve 56, and said inlet check valve 54 is provided with direction and is used for preventing that liquid from flowing into the said flow container 51 that receives, and outlet non-return valve 56 is provided with direction and is used for preventing that liquid from flowing back to said self-priming positive displacement pump 52.
This forced-circulation evaporation device also comprises gas-liquid separation device 8; The import of said gas-liquid separation device 8 is connected with last heater 1 ' of imitating forced-circulation evaporator; Receive the gas liquid mixture of said heater 1 ', said gas-liquid separator 8 tops are located in the outlet one tunnel of said gas-liquid separator 8, are connected with the condenser 4 of said condensation pumping equipment 41 through the indirect steam pipeline; One the road is located at said gas-liquid separator 8 bottoms, is communicated with the pumping equipment 5 of said condensation pumping equipment 41.
Said vacuum extractor 9 is communicated with the steam outlet 23 ' and condensation pumping equipment 41 that two of forced-circulation evaporation device is imitated vaporization chamber 2 ', is provided with the vacuum control valve 32 that is used to control the vacuum extractor break-make between said vacuum extractor 9 and the said multiple-effect forced-circulation evaporation device; Said vacuum control valve 32 is arranged at said vacuum chamber 6 and said last imitated on the pipeline between the forced-circulation evaporator steam outlet 23 '.Forced-circulation evaporator is provided with the blowdown piping that is communicated with atmosphere, and said blowdown piping is provided with the atmospheric valve 31 of control piper break-make.
Shown in Figure 3 is the structural representation of vacuum sampler; Said vacuum sampler 7 comprises logical material valve 71 and is connected in the sample box 72 between logical material valve 71 and the blow-off valve 72; Said and blow-off valve 72 is controlled the break-make of said vacuum sampler 7.Above under vacuum state, opening, material can get in the sample box 72 automatically, closes top logical material valve 71, opens following blow-off valve 73, can emit the material of sample box 72.
When using above-mentioned vacuum multiple-effect forced-circulation evaporation device and concentrating material, may further comprise the steps,
A. vacuum feed: open vacuum pump 6; After opening vacuum control valve 32; Open the inlet valve 30,30 ' of charging main valve 33 and each single-effect evaporator, material to be treated is drawn onto heater tubulation coverage 80% or under the following visor center behind the 300-400mm place; Close charging main valve 33, accomplish fill process;
B. concentration and evaporation circulates: open forced circulation pump 3, the material of each single-effect evaporator begins circulating and evaporating; The thermal source of conduct back 1st effective evaporator in the tubulation of the heater of 1st effective evaporator after the steam of preceding 1st effective evaporator gets into via the vapour-discharge tube road;
C. discharging:
When 1) after the concentration of multi-effect evaporator material detects through vacuum sampler 7, reaching requirement respectively, close vacuum control valve 32, open the atmospheric valve 31 of every single-effect evaporator; 31 '; Make whole device be in atmospheric pressure state, open forced circulation pump 3 respectively, 3 '; Through discharging opening 22,22 ' discharges material respectively;
2) because the efficient of 2nd effect evaporator is high less than 1st effective evaporator; Most applications is that the 1st effective evaporator material reaches requirement; And 2nd effect evaporator does not also meet the requirements of concentration, and at first close vacuum control valve 32 this moment, opens the atmospheric valve 31 of 1st effective evaporator; Open one and imitate forced circulation pump 3, imitate material through discharging opening 22 with one and discharge; Treat that an effect material drains, and opens vacuum control valve 32, the inlet valve 30,30 ' of two effects before and after opening; This moment, 1st effective evaporator was a negative pressure state, and 2nd effect evaporator is an atmospheric pressure state, and the material of 2nd effect evaporator sucks 1st effective evaporator, opened the atmospheric valve 31 ' of two effects; The material of 2nd effect evaporator is closed an effect inlet valve 30 1 effects and is stopped charging after the charging house steward sucks 1st effective evaporator, closes atmospheric valve 31 ', opens forced circulation pump 3; Two materials of imitating circulating and evaporating again in imitates detects through vacuum sampler 7, after concentration reaches requirement; Close vavuum pump 6, open one and imitate forced circulation pump 3, material is discharged through discharging opening 22;
The steam that said process produces is discharged through self-priming positive displacement pump 52 after 41 condensations of condensation pumping equipment.
Though the present invention has carried out detailed elaboration through the specific embodiment to it; But; Any form that does not exceed the claim protection domain that those skilled in the art should be understood that on this basis to be made and the variation of details all belong to invention which is intended to be protected.

Claims (12)

1. a vacuum multiple-effect forced-circulation evaporation device comprises multiple-effect forced-circulation evaporation device and the vacuum extractor that is used to extract gas in the multiple-effect forced-circulation evaporation device, and said multiple-effect forced-circulation evaporation device comprises:
Charging house steward (20), said charging house steward (20) are provided with a charging main valve (33);
At least two imitate the forced-circulation evaporator (40) that is communicated with successively; Every effect forced-circulation evaporator (40) comprises the heater (1) that is communicated with charging house steward (20); The vaporization chamber (2) that is communicated with said heater (1) through circulation pipe (21); The forced circulation pump (3) that is communicated with said circulation pipe (21), and the discharging opening (22) that is arranged on said circulation pipe (21) bottom; Vaporization chamber (2) top in the last effect forced-circulation evaporator is provided with steam outlet (23), and the heater (1 ') of imitating forced-circulation evaporator through pipeline and back one links to each other;
Condensation pumping equipment (41) is communicated with last steam outlet (23 ') of imitating vaporization chamber (the 2 ') top of forced-circulation evaporator, is used for steam condensation and discharging;
Its characteristic is being:
Be provided with the vacuum control valve (32) that is used to control the vacuum extractor break-make between said vacuum extractor (9) and the said multiple-effect forced-circulation evaporation device;
The feed pipe of the forced-circulation evaporator of said each effect (40) is provided with inlet valve (30), is used to control the turnover of feed liquid;
The forced-circulation evaporator of said each effect (40) is provided with the blowdown piping that is communicated with atmosphere, and said blowdown piping is provided with the atmospheric valve (31) of control piper break-make.
2. vacuum multiple-effect forced-circulation evaporation device according to claim 1 is characterized in that:
Also comprise gas-liquid separation device (8), imitate forced-circulation evaporator with said last and be communicated with, realize the discharge of the liquid-vapor mixture in the heater;
The import of said gas-liquid separation device (8) is connected with last heater (1 ') of imitating forced-circulation evaporator; Receive the gas liquid mixture of said heater (1 '); Said gas-liquid separator (8) top is located in the outlet one tunnel of said gas-liquid separator (8); Be connected with the condenser (4) of said condensation pumping equipment (41) through the indirect steam pipeline, the one road is located at said gas-liquid separator (8) bottom, is communicated with the pumping equipment (5) of said condensation pumping equipment (41).
3. vacuum multiple-effect forced-circulation evaporation device according to claim 2 is characterized in that:
Said condensation pumping equipment (41) comprises,
Condenser (4); The same vacuum chamber in upper end (6) of said condenser (4) is communicated with, and said vacuum chamber (6) imitates forced-circulation evaporator steam outlet (23 ') with said last and said vacuum extractor (9) is communicated with;
Receive flow container (51), its upper end is communicated with said condenser (4) and said water separator (8);
Pumping equipment, said pumping equipment is communicated with the said flow container (51) that receives, and discharged by the condensate liquid in the flow container (51) with said; Said pumping equipment comprises self-priming positive displacement pump (52);
The import of said self-priming positive displacement pump (52) communicates through being connected pipeline (53) with the said liquid outlet of flow container (51) that receives, and said fluid pipeline (55) is provided with inlet check valve (54); The outlet of said self-priming positive displacement pump (52) is through fluid pipeline (55) and atmosphere; Said fluid pipeline (55) is provided with outlet non-return valve (56), and said inlet check valve (54) is provided with direction and is used for preventing that liquid from flowing into the said flow container (51) that receives, and outlet non-return valve (56) is provided with direction and is used for preventing that liquid from flowing back to said self-priming positive displacement pump (52).
4. vacuum multiple-effect forced-circulation evaporation device according to claim 3 is characterized in that:
Said vacuum control valve (32) is arranged at said vacuum chamber (6) and said last imitated on the pipeline between the forced-circulation evaporator steam outlet (23 ').
5. according to the arbitrary described vacuum multiple-effect forced-circulation evaporation device of claim 1-4, it is characterized in that:
The bottom of the input duct of the said forced circulation pump of every effect is provided with vacuum sampler (7), and said vacuum sampler (7) comprises logical material valve (71), blow-off valve (73) and is connected in the sample box (72) between logical material valve (71) and the blow-off valve (72); Said logical material valve (71) and blow-off valve (72) are controlled the break-make of said vacuum sampler (7).
6. according to the arbitrary described vacuum multiple-effect forced-circulation evaporation device of claim 1-5, it is characterized in that:
Connecting pipeline between said heater of every effect (1) and the said vaporization chamber of every effect (2) is to get into said vaporization chamber (2) along said vaporization chamber inwall tangential.
7. vacuum multiple-effect forced-circulation evaporation device according to claim 6 is characterized in that:
Be provided with stainless steel cloth in the steam discharge pipe of the said vaporization chamber of every effect (2) top.
8. vacuum multiple-effect forced-circulation evaporation device according to claim 7 is characterized in that:
Said vaporization chamber is provided with visor (10) and following visor (11), and said down visor (11) is arranged in the said vaporization chamber, and apart from heater spray mouth center line upper end 100-150mm; The said distance that goes up visor (11) under visor (10) distance is more than 0.5 meter or is positioned at the vaporization chamber side top.
9. use the method that vacuum multiple-effect forced-circulation evaporation device concentrates material for one kind, it is characterized in that: may further comprise the steps,
A. vacuum feed: open vacuum pump (6), open vacuum control valve (32) after, open the inlet valve (30,30 ') of charging main valve (33) and each single-effect evaporator, treat that material reaches entry level after, close charging main valve (33), accomplish fill process;
B. concentration and evaporation circulates: open forced circulation pump (3), the material of each single-effect evaporator begins circulating and evaporating;
C. discharging:
1) when the concentration of multi-effect evaporator material reaches requirement respectively, close vacuum control valve (32), open the atmospheric valve of every single-effect evaporator, open forced circulation pump respectively, through discharging opening material is discharged respectively;
When 2) current 1st effective evaporator material concentration reaches requirement then the concentration of 1st effective evaporator material does not reach requirement; Close vacuum control valve (32); The atmospheric valve (31) of 1st effective evaporator is opened last effect forced circulation pump (3) before opening, and through discharging opening (22) last effect material is discharged; Treat that last effect material drains; Open vacuum control valve (32), the inlet valve of two effects before and after opening is opened the atmospheric valve (31 ') that imitate back one; The material of back 1st effective evaporator behind the 1st effective evaporator, is closed the atmospheric valve (31 ') of last effect inlet valve (30) and back 1st effective evaporator before the charging house steward sucks; Open forced circulation pump (3) circulating and evaporating, after concentration reaches requirement, material is discharged;
The steam that said process produces is discharged through self-priming positive displacement pump (52) after condensation pumping equipment (41) condensation.
10. application vacuum multiple-effect forced-circulation evaporation device according to claim 9 concentrates the method for material, it is characterized in that:
The steam of 1st effective evaporator gets into via the vapour-discharge tube road in the tubulation of heater of back 1st effective evaporator before among the said step b.
11. application vacuum multiple-effect forced-circulation evaporation device according to claim 10 concentrates the method for material, it is characterized in that:
The described material concentration of step c is to detect through vacuum sampler (7) to obtain.
12. application vacuum multiple-effect forced-circulation evaporation device according to claim 9 concentrates the method for material, it is characterized in that:
The described entry level of step a is distance visor (11) the downward 300-400mm in center down.
CN2010102975811A 2010-09-30 2010-09-30 Multi-effect vacuum forced circulation evaporation device and material concentrating method thereof Expired - Fee Related CN102008829B (en)

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