CN202961914U

CN202961914U - Hybrid vapor mechanical recompression evaporator

Info

Publication number: CN202961914U
Application number: CN 201220683138
Authority: CN
Inventors: 李锦龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-12-12
Filing date: 2012-12-12
Publication date: 2013-06-05
Anticipated expiration: 2022-12-12

Abstract

The utility model discloses a hybrid vapor mechanical recompression evaporator. The hybrid vapor mechanical recompression evaporator comprises an MVR (Mechanical Vapor Recompression) evaporator, a vapor mechanical compressor, a refrigerant mechanical compressor and a heat exchanger, and is characterized by further comprising a secondary steam recovery/compression heating device and a condensed vapour-liquid recovery/compression preheating device. The evaporator adopts the refrigerant mechanical compressor which is used for indirectly conveying heat source through a compressed refrigerant to recycle latent heat in condensed liquid discharged by the secondary steam recovery/compression heating device while adopting the secondary steam recovery/compression heating device to recover secondary vapor generated by the MVR evaporator. As a result, the evaporator is simple, efficient and controllable; and the discharged condensate carries no latent heat so that the final purposes of saving energy and reducing consumption are achieved. The hybrid vapor mechanical recompression evaporator is suitable for evaporation and concentration of liquid-containing materials.

Description

Mixed type steam mechanical recompression evaporator

Technical field

The utility model relates to a kind of solution evaporation concentration device, is specifically related to a kind of steam mechanical recompression evaporator.

Background technology

Existingly directly indirectly carry thermal source with mechanical pump compressed material secondary contracting steam and the cold coal of compression with cold coal, reach two kinds of evaporimeters of the concentrated purpose of material evaporation, their are distinguished and are:

(1) directly compress the MVR evaporimeter of Secondary-steam heating type with mechanical pump, the temperature that this kind equipment is finally discharged condensate liquid is higher, heat energy can not all use and easily cause the portion of energy waste, particularly cannot re-use at some special operation condition condition condensate liquids, the perhaps large condensate liquid of some high temperature storage safety hazard, itself not only consume the energy, more need other low-temperature receiver to be lowered the temperature, so just very waste of the energy.But present stage is because the power that the direct compression pump list pump of the indirect steam of compressed material own just can provide is very large, the demand that can satisfy design on industrial production and control, and design and control are relatively simple.The manufacturer of much making the MVR evaporimeter now all adopts the method.The maximum drawback of Here it is the type evaporimeter.

Wherein, the MVR evaporimeter is the abbreviation of mechanical vapor recompression.MVR is the energy that re-uses the indirect steam that it self produces, thereby reduces a technology of the demand of the energy to external world.

(2) the cold coal of compression carries thermal source to reach the evaporimeter of the concentrated purpose of material evaporation with cold coal indirectly, because such evaporimeter compressed media is that it is larger than water vapour compressibility for cold coal, thereby merit used is also lacked under equal pressure condition, adding cold coal compression function provides pressure also large than vapour compression machine, and the heat source temperature that can provide is more high than the vapour compression machine.And the power that its major defect cold coal compressor that is separate unit provides is very little, and reach industrial demand will use with a lot of compressors are in parallel.But failure rate of machinery is just high in the practice process, is also a challenge in technological design during many compressions in parallel.So in existing MVR evaporimeter manufacturer, this scheme of fortune is relatively also seldom, they are exactly for evading this shortcoming.

The utility model content

The purpose of this utility model is for the deficiencies in the prior art, a kind of mixed type steam mechanical recompression evaporator is provided, overcome a kind of mechanical compress evaporimeter of single employing defective, use complementary support of advantage of two kinds of evaporimeters, take full advantage of discarded steam, hot water, reclaim latent heat, improve the thermal efficiency, energy-saving and cost-reducing.

For realizing the purpose of this utility model, the technical scheme that adopts is:

A kind of mixed type steam mechanical recompression evaporator, it comprises MVR evaporimeter, steam mechanical compressor, cold coal mechanical compressor and heat exchanger, characterized by further comprising:

The indirect steam that the concentrated material of described MVR evaporator evaporation is produced reclaims compression and heats up, and to material again the indirect steam of heating evaporation reclaim the compression heater;

The condensation vapour-liquid that still has surplus heat that described indirect steam is reclaimed the generation of compression heater reclaims, employing comprises that cold coal compressor or other can compress to the condensation vapour-liquid machine of intensification, the condensation vapour-liquid that still has surplus heat is compressed intensification, utilize the heat of vapour-liquid after heating up to reclaim the compression preheating device to the condensation vapour-liquid that the fresh material material that will enter the MVR evaporimeter carries out preheating.

Described indirect steam reclaims the compression heater and comprises MVR evaporimeter, steam mechanical compressor and heat exchanger, wherein, the thermal source input of described steam mechanical compressor is connected with the indirect steam output of described MVR evaporimeter by pipeline, and the thermal source output is connected with the thermal source input of described heat exchanger by pipeline; The feed end of heat exchanger is connected by the discharge end of pipeline with the MVR evaporimeter, and discharge end is communicated with by the feed end of pipeline with the MVR evaporimeter.

Described condensation vapour-liquid reclaims the compression preheating device and comprises cold coal mechanical compressor and three heat exchangers, wherein,

The thermal source input of cold coal mechanical compressor is connected with the thermal source output of described No. three heat exchangers by pipeline, and the thermal source output is connected with the thermal source input of the second heat exchanger by pipeline; The feed end of a heat exchanger is connected with feed pipe, and discharge end is connected with the feed end of No. two heat exchangers by the first conveying pipeline; The discharge end of No. two heat exchangers is connected with the feed end of MVR evaporimeter by the second conveying pipeline; The thermal source input of a heat exchanger is connected with the thermal source output of No. four heat exchangers by No. four discharging tubes, and the thermal source output is connected with the thermal source input of No. three heat exchangers by pipeline.

The mixed type steam mechanical recompression evaporator of above structure, because gas and liquid adopt respectively different compressors and compression process that latent heat is reclaimed, make vapo(u)rization system simple, efficient, controlled, the cold liquid of discharge does not carry latent heat, thereby finally reaches energy-saving and cost-reducing purpose.

Description of drawings

Fig. 1 is structural representation of the present utility model;

In the drawings, 1, number heat exchanger 2 of feed pipe, 3, No. four heat exchangers 4 of No. four row's condensate lines, vapour compression machine steam outlet pipe 5, vapour compression machine 6, vapour compression machine steam inlet pipe 7, upper conveying pipeline 8, MVR evaporimeter 9, lower conveying pipeline 10, inlet valve 11, blow-off valve 12, the second conveying pipeline 13, cold coal heat release

efferent duct

14,15, No. two heat exchangers 16 of cold coal compressor, the first conveying pipeline 17, cold coal heat release recurrent canal 18, cold coal heat absorption

recurrent canal

19,20, No. three heat exchangers 21 of No. three discharging tubes, cold coal endothermic tube.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Shown in Figure 1, be structural representation of the present utility model, this evaporimeter mainly is comprised of material indirect steam compressor 6, cold coal compressor 15 and MVR evaporation vapour device 9 and three

heat exchangers

2,16 and 21.Wherein, the secondary steam that indirect steam compressor 6 produces material evaporation in MVR evaporation vapour device 9, draw to vapour compression machine 6 compression by vapour compression machine steam inlet pipe 7, after the compressed intensification of secondary steam, heat exchanger 4 provides thermal source for No. four by vapour compression machine steam outlet pipe 5; Material, is got back in MVR evaporation vapour device 9 by lower conveying pipeline 10 again after No. four heat exchangers 4 heat again by upper conveying pipeline 8, consists of circulating and evaporating concentrated, keeps vapo(u)rization system and normally moves.After secondary steam in No. four heat exchangers 4 is liquefied as liquid, be defeated by a heat exchanger 2 and No. three heat exchangers 21 by No. four row's condensate lines 3, condensate liquid is discharged from No. three discharging tubes 20.Cold coal compressor 15 by cold coal endothermic tube 22 be connected coal heat absorption recurrent canal 19 and be connected with No. three heat exchangers 21, absorb the waste heat energy of No. three heat exchanger 21 discharge condensate liquids, and with the heat energy that obtains after cold coal compressor 15 compressions heat up, by cold coal heat release efferent duct 14 and cold coal heat release recurrent canal 18, heat energy is defeated by the second heat exchanger 16, the fresh material material preheating to just having entered in the second heat exchanger 16.

Described heat exchanger can be that plate type heat exchanger can be also shell-and-tube heat exchanger, and its function reaches heat exchange effect and gets final product.

In the drawings, the utility model evaporimeter has adopted four heat exchangers, and wherein, No. four heat exchangers 4 are affiliated structures of MVR evaporimeter 9; The feed end of a heat exchanger 2 is connected with feed pipe 1, and discharge end is connected with the feed end of No. two heat exchangers 16 by the first conveying pipeline 17; The discharge end of No. two heat exchangers 16 is connected with the feed end of MVR evaporimeter 9 by the second conveying pipeline 13.The thermal source input of a heat exchanger 2 is connected with the thermal source output of No. four heat exchangers 4 by No. four discharging tubes 3, and the thermal source output is connected with the thermal source input of No. three heat exchangers 21 by pipeline; The discharge end of No. two heat exchangers 16 is connected with the feed end of described MVR evaporimeter 9 by the second conveying pipeline 13.The charging aperture of MVR evaporimeter 9 is provided with inlet valve 11, and the side under inlet valve 11 is provided with blow-off valve 12 and efferent duct thereof.Open inlet valve 11 when charging, close blow-off valve 12; During discharge, otherwise operation, close inlet valve 11, opens blow-off valve 12.The feed end of MVR evaporimeter 9 also is communicated with the discharge end of No. four heat exchangers by lower conveying pipeline 10, and discharge end is communicated with the feed end of No. four heat exchangers 4 by upper conveying pipeline 8.The thermal source input of described steam mechanical compressor 6, be connected by the steam output end of vapour compression machine steam inlet pipe 7 with described MVR evaporimeter 9, the thermal source output of MVR evaporimeter 9 is connected with the thermal source input of described No. four heat exchangers 4 by vapour compression machine steam outlet pipe 5.The thermal source input of cold coal mechanical compressor 15, by cold coal heat release efferent duct 14 be connected coal heat release recurrent canal 18 and be connected with No. two heat exchangers 16.Cold coal compressor 15 also by cold coal endothermic tube 22 be connected coal heat absorption recurrent canal 19 and be connected with No. three heat exchangers 21, absorbs the waste heat that No. three heat exchangers 21 are discharged condensate liquids, and with this heat energy through pressurize and intensification after pass through No. two heat exchangers 16 and heat to the fresh material material.No. three discharging tube 20 is discharged condensate liquid.Certainly, can also can discharge condensate liquid recovery waste heat wherein to No. three heat exchangers 21 to the machine that the compression of condensation vapour-liquid heats up with other, after overcompression heats up, the fresh material material that has just entered be carried out preheating.

Operation principle of the present utility model is:

Need the fresh material material of evaporation and concentration to enter into heat exchanger 2 No. one by feed pipe 1, by the heat energy preheating first from No. four heat exchangers 4 material evaporation condensate liquid out, enter heat exchanger 16 No. two by the first conveying pipeline 11 again, with reclaiming through cold coal compressor 15 and after the condensate liquid heat energy of pressurization after heating up heats, then enter in MVR evaporimeter 9 by the second conveying pipeline 13 and evaporate.The concentrated indirect steam that produces of material evaporation is from the vapour compression machine steam inlet pipe 7 of MVR evaporimeter 9 upper ends in MVR evaporimeter 9, entering into the interior processing of secondary steam compressor 6 heats up, enter into No. four heat exchangers 4 by vapour compression machine steam outlet pipe 5 again and carry out heat exchange with material, institute's condensation fluid that produces is through No. four discharging tubes 3 discharges.The condensate liquid of discharging from No. four discharging tubes 3 enters into a parallel operation 2 and carries out a heat exchange with the fresh material material that has just entered, then enters No. three heat exchangers 21 and carry out heat exchange with the cold coal Compression Evaporation liquid that cold coal compressor 15 produces, and finally discharges from No. three discharging tubes 20.The waste heat that cold coal compressor 15 absorbs from condensate liquid preheats to the fresh material material by No. two heat exchangers 16 through pressurization with after heating up.And this is finally from the condensate liquid of No. three discharging tube 20 discharges, due to after cold coal Compression Evaporation liquid cooling, generally only has the subzero several years, and the latent heat of namely discharging in condensate liquid is all finished using.So, reached energy-saving and cost-reducing effect and final purpose.

The people of any MVR of understanding principle of communicating due to technology; can carry out some little improvement to a utility model can use; thereby the scope of the utility model protection is except comprising except the above method of enumerating, and other any type of raw materials produce indirect steam MVR systems and cold coal MVR system to be mixed the structure of using and be the scope that the utility model is protected in same evaporation process.

Claims

1. mixed type steam mechanical recompression evaporator, it comprises the recompression of MVR(steam mechanical) evaporimeter, steam mechanical compressor, cold coal mechanical compressor and heat exchanger, characterized by further comprising:

The indirect steam that described MVR evaporimeter (9) evaporation and concentration material is produced reclaims compression and heats up, and to material again the indirect steam of heating evaporation reclaim the compression heater;

The condensation vapour-liquid that still has surplus heat that described indirect steam is reclaimed the generation of compression heater reclaims, employing comprises that cold coal compressor (15) or other can compress to the condensation vapour-liquid machine of intensification, the condensation vapour-liquid that still has surplus heat is compressed intensification, utilize the heat of vapour-liquid after heating up to reclaim the compression preheating device to the condensation vapour-liquid that the fresh material material that will enter the MVR evaporimeter carries out preheating.

2. mixed type steam mechanical recompression evaporator according to claim 1 is characterized in that:

Described indirect steam reclaims the compression heater and comprises MVR evaporimeter (9), steam mechanical compressor (6) and No. four heat exchangers (4), wherein, the thermal source input of steam mechanical compressor (6) is connected with the indirect steam output of described MVR evaporimeter (9) by vapour compression machine steam inlet pipe (7), and the thermal source output is connected with the thermal source input of No. four heat exchangers (4) by vapour compression machine steam outlet pipe (5); The feed end of No. four heat exchangers (4) is connected with the discharge end of MVR evaporimeter (9) by upper conveying pipeline (8), and discharge end is communicated with the feed end of MVR evaporimeter by lower conveying pipeline (10).

3. mixed type steam mechanical recompression evaporator according to claim 1 is characterized in that:

Described condensation vapour-liquid reclaims the compression preheating device and comprises cold coal steam mechanical compressor (15) and three heat exchangers (2,13,21), wherein, the thermal source input of cold coal mechanical compressor (15), by cold coal endothermic tube (22) be connected coal heat absorption recurrent canal (19) and be connected with the thermal source output of No. three heat exchangers (21), the thermal source output by cold coal heat release efferent duct (14) be connected the thermal source input of coal heat release recurrent canal (18) with the second heat exchanger (16) and be connected; The feed end of a heat exchanger (2) is connected with feed pipe (1), and discharge end is connected with the feed end of No. two heat exchangers (16) by the first conveying pipeline (17); The discharge end of No. two heat exchangers (16) is connected with the feed end of MVR evaporimeter (9) by the second conveying pipeline (13); The thermal source input of a heat exchanger (2) is connected with the thermal source output of No. four heat exchangers (4) by No. four discharging tubes (3), and the thermal source output is connected by the thermal source input of pipeline with No. three heat exchangers (21).