CN2188854Y - Vacuum dehydrating and drying equipment - Google Patents

Abstract

The utility model makes an improvement of the vacuum dehydrating and drying equipment which is used for the dehydration and the refreshment of the vegetable and the Chinese herbal medicine, and the concentration, the dehydration and the granulation of the solution and the viscous liquid. A steam jet vacuum pump is adopted as a vacuum system. A heating pipe is arranged in a jacket drying room. The steam exhaust port of the second stage jetting device of the vacuum pump is communicated with a rotary joint, the jacket of the drying room and the inner heating pipe through pipelines. A return circuit for heating the entering steam of the mixing steam and exhausting the waste steam is formed by the pipelines and the rotary joint. The utility model realizes the efficient utilization of the general in the jetting device and the evaporating steam in the drying room. The efficiency of the working pressure and the dryness is high, and the quality and the nutrient component of the vegetable and the Chinese herbal medicine are effectively protected.

Description

Vacuum dehydrating and drying equipment

The utility model relates to the improvement of the vacuum dehydration drying equipment that is used for vegetables and Chinese herb medicine dewatering and freshness retaining, solution and viscous fluid thickening granulation.

The dry equipment that adopts of at present domestic various dewatering vegetables is generally normal pressure heated-air drying equipment.Its shortcoming is that occupation area of equipment and energy consumption are big, and efficient is low, poor working environment, and labour intensity is big, and is bigger to the quality of vegetable influence, causes the loss of vegetable nutrient composition.

Also have employing vacuum freeze-drying equipment to dehydrate for vegetables and Chinese herb medicine, the vacuum system of this equipment is a mechanical pump.Its shortcoming is that the entire equipment investment is big with energy consumption, and drying efficiency is low, and drying cost is very high.But adopt this equipment drying less, can keep its nutrition vegetables and medicine quality influence.

Solution and viscous fluid thickening granulation generally also are to adopt vacuum dryer, and its vacuum system is water-ring vacuum pump or water-jetting type vavuum pump.Adopting the shortcoming of water-ring vacuum pump is that its rotor is easy to wear, thereby easily causes the pump work performance to descend, and its maintenance load is big, the working vacuum degree that can reach lower (＜600 holder), and exhaust capacity is little, and the drying efficiency of equipment is low, and energy consumption is big.The shortcoming of water-jetting type vavuum pump is that complexity is installed, working vacuum degree lower (＜650 holder), and the equipment drying efficiency is also lower.

Introduced a kind of liquid concentration granulation vacuum dryer among Japan " food machinery equipment " nineteen ninety Vo1.27, the No.4, this equipment adopts water-ring vacuum pump as vacuum system, possesses the shortcoming that above-mentioned employing water-ring vacuum pump is brought equally.This equipment utilizes chuck to feed Steam Heating in the drying outside, but firing rate is slower, and efficient is lower.

This shows that the vacuum system that existing vegetables and Chinese herb medicine dewatering and freshness retaining, solution and viscous fluid dehydration granulation vacuum dryer are adopted is mechanical pump, water-ring vacuum pump or water-jetting type vavuum pump, its shortcoming as previously mentioned.On the other hand, these equipment all do not utilize the evaporation vapour of hothouse and the general vapour of working steam of pump, cause energy waste, have reduced the drying efficiency of equipment.

The purpose of this utility model is to Japan " food machinery equipment " nineteen ninety Vo1.27; the vacuum dryer of introducing among the No.4 is done an improvement; adopt steam-jet vacuum pump as vacuum system; and realize evaporating making full use of of vapour and the general vapour of injector; make equipment working vacuum degree height; the energy utilization rate height; energy consumption is little; the drying efficiency height; speed is fast; drying cost is low, working stability, and maintenance capacity is little; and can be applicable to vegetables and Chinese herb medicine dewatering and freshness retaining; different purposes such as solution and viscous fluid thickening granulation, the while can effectively be protected the nutrition of vegetables and Chinese herb medicine.

The utility model structure diagram is seen Figure of description.

1 is swivel joint among the figure, and A is swivel joint place mixed steam (general vapour of injector and hothouse evaporation vapour) import, and B is the waste vapour row mouth after mixed steam heats hothouse, 1 interlayer pipe and hothouse left end main shaft interlayer pipe UNICOM.2 is jacketed dryer, obtains certain vacuum by vacuum system when in running order and is heated, and finishes dehydrating material.3 be device in hothouse several groups of U type heating tubes or the heating tube of other shapes, to realize that the hothouse material is carried out the heating of heart portion.The effect of swivel joint 1 is mixed steam to be fed along main shaft interlayer pipe in the chuck of hothouse 2 and in the heating tube 3 by it, realizes that heating and the waste vapour of hothouse when work is found time in rotation discharge.4 is the chain wheel driving mechanism that connects with hothouse right-hand member main shaft, and it makes hothouse rotation when work, thereby material is constantly stirred in dry run, has guaranteed the uniformity of dry materials.The vacuum system of equipment is made up of second level steam jet ejector 5, first order steam jet ejector 6, evacuation tube 7, the stop valve 8 of finding time, condenser 9 and water storing tank 10.The effect of second level steam jet ejector 5 is as forepump, make system produce necessary black vacuum, it takes out mouth and condenser 9 upper end UNICOMs, C end (thin end) is two spray steam supply mouths, A ' end (butt end) is two spray steam drains, connect with swivel joint air intake A by pipeline, to realize utilization mixed steam.First order steam jet ejector 6 makes system reach needed working vacuum degree, produce enough abilities of drawing gas, thereby reach the purpose of raising equipment drying efficiency, it is taken out mouth and connects evacuation tube 7, D end (thin end) is a spray steam supply mouth, E end (butt end) is a spray steam drain, it and condenser 9 lower end UNICOMs.The passage that evaporation vapour was drawn out of in the hothouse when evacuation tube 7 was equipment work, mouth is taken out in a termination one spray, and the other end feeds in the hothouse by hothouse right-hand member main shaft interlayer.The effect of condenser 9 is condensation one general vapour of spray and evaporation vapour, reduces the load of two sprays, improves the efficient of two sprays simultaneously, reduces the total energy consumption of equipment.Water storing tank 10 has guaranteed to form energy-efficient vacuum system when the two-stage ejector operate as normal, and stores condensed water.11 is frame, and the end main shaft by plain bearing arrangement thereon about hothouse.

The utility model adopts steam-jet vacuum pump as vacuum system, can produce higher working vacuum degree, and the working vacuum degree reaches as high as 30 holders, exhaust capacity is big, working stability, maintenance capacity is little, has realized the effective utilization to evaporation vapour and the general vapour of injector simultaneously, utilizing it that hothouse is carried out the inside and outside heats simultaneously, the energy utilization rate height, energy consumption is little, and drying efficiency and speed improve greatly, and drying cost reduces, and dry back product quality increases.This equipment can be widely used in vegetables and Chinese herb medicine dewatering and freshness retaining, solution and viscous fluid thickening granulation, and can effectively protect the quality and the nutrition of vegetables and Chinese herb medicine.

Claims (1)

1. A kind of vacuum dehydration drying equipment that is used for vegetables and Chinese herb medicine dewatering and freshness retaining, solution and viscous fluid thickening granulation, it is characterized in that: (1) adopts steam-jet vacuum pump as vacuum system, and it is made of series connection condenser and water storing tank in the middle of the two-stage steam jet ejector; (2) heating tube of device U type or other shapes in the jacketed dryer, the steam drain of second level steam jet ejector constitutes mixed steam admission heating and waste steam exhausting loop by pipeline and swivel joint and hothouse chuck and interior heating tube UNICOM by pipeline and swivel joint.

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