A liquid-gas linkage forced circulation heat pump low-temperature evaporation concentration crystallization device

A technology of forced circulation and low temperature evaporation, which is applied in the direction of solution crystallization, evaporation, evaporator accessories, etc., to achieve the effects of reducing energy consumption, reducing equipment volume, and enhancing heat transfer efficiency

Active Publication Date: 2015-08-05
HEBEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a liquid-gas linkage forced circulation low-temperature spray evaporation device, which can effectively solve the technical bottleneck of the existing small batch, high concentration ratio, and intermittent concentration operation of heat-sensitive materials

Method used

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  • A liquid-gas linkage forced circulation heat pump low-temperature evaporation concentration crystallization device
  • A liquid-gas linkage forced circulation heat pump low-temperature evaporation concentration crystallization device
  • A liquid-gas linkage forced circulation heat pump low-temperature evaporation concentration crystallization device

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Embodiment 1

[0057] Taking the 28% D-p-hydroxyphenylglycine evaporation concentration and crystallization system of a certain pharmaceutical factory as an example, the specific requirements are: the single batch processing capacity is 350Kg, the evaporation temperature of the liquid medicine is less than 40 degrees, the evaporation residence time is less than 1 hour, and the final concentration Greater than 67%, that is, the distilled water strength is greater than 200Kg / h. The specific embodiment of the present invention and technology, equipment parameter are as follows (different mother liquor initial conditions are different, and heat transfer coefficient, heat transfer area are slightly different):

[0058] 1) First turn on the Roots vacuum pump (7), then turn on the vacuum valve (13), and the system is pre-vacuumized.

[0059] 2) After the vacuum degree reaches -0.095, slightly open the feed valve (10), so that the raw material enters the evaporator (1) from the raw material tank (4)...

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Abstract

The invention discloses a low-temperature evaporation, concentration and crystallization device of a gas-liquid linkage forced circulation heat pump. The device comprises an evaporator, a steam ejector, a secondary steam condenser, a raw material tank, a heating steam liquid condensation tank, a secondary steam liquid condensation tank, a vacuum pump and an inert gas storage tank; the evaporator also comprises an inert gas inlet distribution device, a vertical type tube nest heating chamber II, a liquid-gas outlet nozzle, a steam-liquid separation chamber, a foam remover, a liquid level meter, a material liquid distribution device, a communicating pipe and a vertical type tube nest heating chamber I. According to the low-temperature evaporation, concentration and crystallization device of the gas-liquid linkage forced circulation heat pump, two-stage series low-temperature steam is used for heating; pump-free forced circulation is realized by using liquid-steam linkage manner, thus direct utilization of high-temperature boiler steam in low-temperature evaporation can be realized; the overall system is compact in structure, convenient to operate and wash. The low-temperature evaporation, concentration and crystallization device of the gas-liquid linkage forced circulation heat pump is especially suitable for evaporating or crystallizing heat-sensitive materials under the condition of high concentrated strength.

Description

technical field [0001] The invention relates to the technical field of energy saving and emission reduction and chemical separation, and is mainly aimed at a process and device for low-temperature intermittent evaporation concentration or crystallization of heat-sensitive materials with small batches and high evaporation intensity in chemical industry, pharmaceuticals and food. technical background [0002] In the evaporation and concentration operation, heat-sensitive materials are more sensitive to the evaporation temperature and the temperature of the medium. Especially in the field of medicine, some products are not resistant to high temperature, and even require the concentration temperature not to exceed 40°C. If the evaporation temperature is slightly higher, or if it stays above the high temperature for too long, the efficacy of the medicine will decrease or even deteriorate. In order to reduce the evaporation temperature of the liquid medicine, the traditional proc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D9/02B01D1/00B01D1/30
Inventor 陶金亮牛志刚史晓平魏峰
Owner HEBEI UNIV OF TECH
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