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Water circulation type mechanical steam re-compression MVR drying system and method thereof

A technology of mechanical steam and drying system, applied in drying solid materials, drying gas arrangement, drying and other directions, can solve the problems of difficult drying of materials, humidification and condensation, low moisture content, etc., and achieves fast drying rate and easy control. Effect

Active Publication Date: 2017-03-15
JIANGSU LEKE ENERGY SAVING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the post-compression superheat of the water vapor compressor is relatively small, if the superheated steam is eliminated during the drying process of the material, it will reach a saturated state, and the drying process will not continue, and the material will even be humidified by saturated steam and condense, etc. Phenomenon, it is difficult to obtain a lower moisture content for dry materials

Method used

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  • Water circulation type mechanical steam re-compression MVR drying system and method thereof
  • Water circulation type mechanical steam re-compression MVR drying system and method thereof
  • Water circulation type mechanical steam re-compression MVR drying system and method thereof

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Embodiment 1

[0022] figure 1 It is the schematic diagram of the present invention. Water cycle mechanical vapor recompression MVR drying system, including compressor 1, cyclone dust collector 2, primary dryer 3, condenser 4, condensed water tank 5, circulation pump 6, secondary dryer 7, air heater 8, Circulating fan 9, air inlet valve 10, air inlet fan 11, air exhaust valve 12.

[0023] The system consists of three sub-loops: superheated steam drying cycle, water cycle and air drying cycle. The compressor 1, primary dryer 3, cyclone dust collector 2, and condenser 4 are connected end to end in turn to form a superheated steam drying circulation loop. In this circulation loop, the air outlet of the cyclone dust collector is connected with the compressor inlet, and the compressor outlet A raw steam inlet pipe is arranged on the pipeline to the primary dryer. Described condenser is provided with drainage pipe, and leads to condensation water tank 5. The condensed water tank 5, circulatio...

Embodiment 2

[0028] System principle such as image 3 As shown, the system composition and working principle of this embodiment are the same as those of Embodiment 1.

[0029] The compressor 1 in this embodiment adopts a screw compressor, the primary dryer 3 adopts a drum dryer, the condenser 4 and the air heater 8 adopt a plate heat exchanger, and the secondary dryer 7 adopts a drum with a built-in circulating water interlayer Dryer, circulating fan 9 and air inlet fan 11 adopt axial flow fan.

Embodiment 3

[0031] System principle such as Figure 4 As shown, the system composition and working principle of this embodiment are the same as those of Embodiment 1.

[0032]The compressor 1 in this embodiment adopts a Roots compressor; the primary dryer 3 adopts a drum dryer; the secondary dryer 7 adopts a drum dryer with a built-in circulating water interlayer; the condenser 4 adopts a contact condenser, and the The circulating water is sprayed into the condenser and directly contacts with the secondary steam generated by the primary dryer to realize the recovery of the latent heat of steam condensation; the air heater 8 adopts a finned tube heat exchanger; the circulating fan 9 and the inlet Fan blower 11 adopts axial fan.

[0033] The invention divides the drying process of the material into two sections, the constant-speed drying section adopts superheated steam circulation drying, and the slow-down drying section adopts hot air circulation drying. The system heats the material an...

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Abstract

The invention relates to a water circulation type mechanical steam re-compression MVR drying system and a method thereof, and belongs to the technical field of material drying. According to the system, a superheat steam drying circulation loop is composed of a compressor, a first-stage drier, a cyclone dust collector and a condenser; a water circulation loop is composed of a condensate water tank, a circulation pump, a second-stage drier, an air heater and the condenser; an air drying circulation loop is composed of the second-stage drier, the air heater and a circulation draught fan; the superheat steam drying circulation loop and the water circulation loop are in coupled connection through the condenser; and the water circulation loop and the air drying circulation loop are in coupled connection through the second-stage drier and the air heater. The system is high in drying rate, capable of saving energy, high in efficiency and easy to regulate and control.

Description

technical field [0001] The invention relates to a drying system, in particular to a water circulation mechanical vapor recompression MVR drying system and a method thereof. Background technique [0002] Drying is an important process in industrial production, and it is involved in almost all industrial fields such as agriculture, food, chemical industry, ceramics, medicine, and agricultural and sideline product processing. The energy demand of the drying process is relatively large, so it is of great significance to develop an efficient and energy-saving drying system. [0003] Superheated steam drying is a new drying method developed in recent years. It has the advantages of large drying heat transfer coefficient, high drying efficiency, small mass transfer resistance, and good drying quality. Superheated steam can be produced by heating or vapor compression. Mechanical vapor recompression MVR drying refers to: the compressor mechanically compresses the secondary steam ge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B21/00F26B21/04F26B25/00
CPCF26B21/003F26B21/005F26B21/04F26B25/005
Inventor 夏君君彭涛
Owner JIANGSU LEKE ENERGY SAVING TECH CO LTD