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Preheat the air medium to start the mvr evaporation system

An evaporation system and air medium technology, applied in the field of energy-saving technology, can solve the problems of complex system composition and increased equipment investment costs

Inactive Publication Date: 2018-10-30
杜明生
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AI Technical Summary

Problems solved by technology

[0002] MVR technology is an important energy-saving technology mainly used in the evaporation industry. The MVR evaporation system usually requires auxiliary means such as steam generation or electric heating to start operation. At the same time, the MVR compressor is required to be able to run at variable speeds, which complicates the system structure and increases equipment investment costs.

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  • Preheat the air medium to start the mvr evaporation system

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Embodiment Construction

[0007] The important steps and main points of the start-up operation of the MVR evaporation system of the present invention are described as follows:

[0008] 1. Prepare to start the operation of the MVR evaporation system, first do other necessary inspections, and then fully open the air suction inlet gate valve of the separation equipment, the secondary steam pipeline and condensate pipeline are all unblocked, and there is no condensate on the top of the heating chamber of the heating equipment The non-condensable gas outlet valve at the outlet and the top of the condensate tank is fully opened, the external vent valve of the non-condensable gas connecting pipeline is fully opened, and the valve connected to the vacuum system is closed first.

[0009] 2. Start and run the MVR compressor, completely close the non-condensable gas outlet valve on the top of the heating chamber after normal start, and use the air medium to preheat the secondary steam pipeline and heating equipmen...

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Abstract

A MVR technology is mainly used in a key energy saving technology of an evaporation industry. Usually, a MVR evaporation system is started and operated by a steam production or electrothermal auxiliary means, and simultaneously, a MVR compressor must be operated at a variable rate so that the system is complex and an equipment investment cost is improved. The invention discloses an air medium preheating starting MVR evaporation system. The air medium preheating starting MVR evaporation system utilizes a compression function of a MVR compressor to compress an air medium, improves an air medium temperature thereby preheating a material liquid to be evaporated after air medium temperature increasing so that the material liquid satisfies evaporation conditions and more and more secondary steam is separated, and the compressed secondary steam can provide more heat for the material liquid so that system operation is gradually started. The invention provides a novel method for starting and operating the MVR evaporation system. The novel method simplifies a system structure and reduces a system integration cost.

Description

technical field [0001] The invention relates to a mechanical vapor recompression system (abbreviated as MVR), which is mainly used as an energy-saving technology in the evaporation industry. Background technique [0002] MVR technology is an important energy-saving technology mainly used in the evaporation industry. The MVR evaporation system usually needs auxiliary means such as steam generation or electric heating to start operation. At the same time, the MVR compressor is required to be able to operate at variable speeds, which complicates the system structure and increases equipment investment costs. The air medium preheating of the present invention starts the MVR evaporation system, uses the compression function of the MVR compressor to compress the air medium, increases the temperature of the air medium, and then preheats the material liquid to be evaporated, so that the evaporation conditions of the material liquid are gradually achieved. Contents of the invention ...

Claims

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Application Information

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IPC IPC(8): B01D1/14B01D1/30
Inventor 杜明生
Owner 杜明生
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