CN100513931C

CN100513931C - Fluidize adsorption continuous refrigeration system and method thereof

Info

Publication number: CN100513931C
Application number: CNB2007101897673A
Authority: CN
Inventors: 魏新利; 孟祥睿; 马新灵
Original assignee: Zhengzhou University
Current assignee: Zhengzhou University
Priority date: 2007-10-17
Filing date: 2007-10-17
Publication date: 2009-07-15
Anticipated expiration: 2027-10-17
Also published as: CN101140113A

Abstract

The invention provides a fluidized adsorption continuous refrigeration system and its method, wherein the system comprises a refrigeration part composed of an evaporator (2), a throttle valve (3), a liquid storage tank (4) and a condenser (5), an adsorption part resulting in that an adsorbent adsorbs a refrigerant and is cooled down by the refrigerant, and a desorption part resulting in that the adsorbent is heated up and the refrigerant is desorbed; the adsorption part comprises a venturi tube (1), a compressor (6), an adsorption bed (7) and a gas-solid separator (8); the desorption part comprises a gas-solid separator (9), a vacuum valve (10), a vacuum valve (11), a desorption bed (12), a heat exchanger (14) and a compressor (13); the method comprises a heat-absorbing temperature rise, desorption, circulation, refrigeration, adsorption, recirculation and other steps. The system directly implements heat exchange and material exchange with the refrigerant and the adsorbent, which realizes the simultaneous implementation of heat transfer and mass transfer in order to result in that the capacity of heat transfer and mass transfer is strengthened, and realizes the continuous refrigeration or heating and improves the heat utilization efficiency.

Description

Fluidize adsorption continuous refrigeration system and method thereof

Technical field

The present invention relates to a kind of Fluidize adsorption continuous refrigeration system and method thereof, belong to the absorption refrigeration technical field.

Background technology

At present, adsorptive refrigeration technology becomes people's research emphasis day by day, but there is two large problems in this technology: it is less that 1, the characteristics of the porous of adsorbent own make its thermal conductivity factor; 2, the thermal contact resistance between adsorbent and heat-transfer metal wall is bigger, when cold fluid and hot fluid was alternately realized the desorption of cold-producing medium and absorption by recuperator (shell-and-tube, spiral plate type, plate-fin) with heating or cooling adsorbent, the own sensible heat of heat exchanger and adsorbent changes can increase extra thermal loss.

At present, the main way that addresses this problem is: adsorbent is cured in the metal tube or pipe outer reducing thermal contact resistance, and increase adsorbent internal heat transfer coefficient;

But, the problem of Chu Xianing is thereupon: the diffusional resistance of cold-producing medium (adsorbate) in solid absorbent is bigger, when especially adsorbent being solidified for raising adsorbent heat transfer coefficient, and, adsorbent solidifies the back absorption resistance and increases, the thickness of requirement adsorbent can not be excessive, generally need be controlled at below the 5mm.

Because adsorbent need be realized the function of mechanical compressor by alternately heating or cooling, thereby, the refrigeration of single adsorbent bed or to heat be discontinuous.

For improving efficiency of utilization and continuous cooling or heating, often adopt two or more adsorbent beds to be used, alternately heating or cooling, and realize that by the complicated pipelines valve system backheat returns matter and approximate continuous ground refrigeration or heat.

Though Chinese scholars has proposed rotary absorbing refrigeration system, but still can not overcome the problems referred to above fully.

In order to overcome the above problems, people are seeking a kind of desirable technical solution always.

Summary of the invention

The objective of the invention is at the deficiencies in the prior art, thereby a kind of efficient heat transfer mass transfer ability and can continuous cooling or the Fluidize adsorption continuous refrigeration system that heats of having is provided, a kind of Fluidize adsorption continuous refrigeration method also is provided.

To achieve these goals, the invention provides a kind of Fluidize adsorption continuous refrigeration system, comprise the refrigerating part of forming by evaporimeter 2, choke valve 3, receiver 4, condenser 5, this continuous refrigeration system also comprises the absorbed portion that makes adsorbents adsorb cold-producing medium and cooling, and adsorbent is heated up and with the desorption part of cold-producing medium desorption;

Described absorbed portion comprises Venturi tube 1, first compressor 6, adsorbent bed 7 and first gas-solid separator 8;

Described desorption portion branch comprises second gas-solid separator 9, first vacuum valve 10, second vacuum valve 11, desorption bed 12, heat exchanger 14 and second compressor 13;

Wherein, described second vacuum valve, 11 1 ends are communicated with described second compressor, 13 1 ends, and described second compressor, 13 other ends are communicated with described heat exchanger 14 1 ends, and described heat exchanger 14 other ends are communicated with described desorption bed 12 bottoms;

Described desorption bed 12 tops are communicated with 9 imports of described second gas-solid separator, described second gas-solid separator, 9 gas vents are communicated with described second vacuum valve, 11 other ends and described first vacuum valve, 10 1 ends respectively, and described second gas-solid separator, 9 solid particles outlet is communicated with described adsorbent bed 7 bottoms;

Described adsorbent bed 7 tops are communicated with 8 imports of described first gas-solid separator, and described first gas-solid separator, 8 solid particles outlet is communicated with described desorption bed 12 bottoms, and described first gas-solid separator, 8 gas vents are communicated with described first compressor, 6 one ends;

Described first compressor, 6 other ends are communicated with described Venturi tube 1 import, and described Venturi tube 1 outlet is communicated with described adsorbent bed 7 bottoms;

Described first vacuum valve, 10 other ends are communicated with described condenser 5 one ends, described condenser 5 other ends are communicated with described receiver 4 one ends, described receiver 4 other ends are communicated with described choke valve 3 one ends, described choke valve 3 other ends are communicated with described evaporimeter 2 one ends, and described evaporimeter 2 other ends are communicated with described Venturi tube 1.

The relative prior art of the present invention has outstanding substantive distinguishing features and obvious improvement, specifically, this system architecture is simple, movable part is few, stationary seal, by directly utilizing cold-producing medium (adsorbate) as heat (or cold) media, and direct the contact with adsorbent carried out exchange heat and mass exchange, realized that heat and mass carries out simultaneously, heat and mass ability between both (adsorbent and adsorbates) is strengthened greatly, and can be realized continuous cooling or heat, simultaneously, each heat exchanger, adsorbent bed and desorption bed no longer alternately heat up and lower the temperature, and have improved heat utilization efficiency greatly.

Description of drawings

Fig. 1 is the structural representation of Fluidize adsorption continuous refrigeration system of the present invention.

The specific embodiment

Below by the specific embodiment, technical scheme of the present invention is described in further detail.

As shown in Figure 1: a kind of Fluidize adsorption continuous refrigeration system, comprise to the external world absorbing or the refrigerating part of release heat, make the absorbed portion of adsorbents adsorb cold-producing medium and cooling, and adsorbent is heated up and the desorption part of cold-producing medium desorption;

Described refrigerating part comprises by evaporimeter 2, choke valve 3, receiver 4 and condenser 5;

Described absorbed portion comprises Venturi tube 1, compressor 6, adsorbent bed 7 and gas-solid separator 8;

Described desorption portion branch comprises gas-solid separator 9, vacuum valve 10, vacuum valve 11, desorption bed 12, heat exchanger 14 and compressor 13;

Wherein, described vacuum valve 11 1 ends are communicated with described compressor 13 1 ends by pipeline, and described compressor 13 other ends are communicated with described heat exchanger 14 1 ends by pipeline, and described heat exchanger 14 other ends are communicated with described desorption bed 12 bottoms by pipeline;

Described desorption bed 12 tops are communicated with described gas-solid separator 9 imports by pipeline, described gas-solid separator 9 gas vents are communicated with described vacuum valve 11 other ends and described vacuum valve 10 1 ends by pipeline respectively, and described gas-solid separator 9 solid particles outlet is communicated with described adsorbent bed 7 bottoms by pipeline;

Described adsorbent bed 7 tops are communicated with described gas-solid separator 8 imports by pipeline, and described gas-solid separator 8 solid particles outlet is communicated with described desorption bed 12 bottoms by pipeline, and described gas-solid separator 8 gas vents are communicated with described compressor 6 one ends by pipeline;

Described compressor 6 other ends are communicated with described Venturi tube 1 import by pipeline, and described Venturi tube 1 outlet is communicated with described adsorbent bed 7 bottoms by pipeline;

Described vacuum valve 10 other ends are communicated with described condenser 5 one ends by pipeline, described condenser 5 other ends are communicated with described receiver 4 one ends by pipeline, described receiver 4 other ends are communicated with described choke valve 3 one ends by pipeline, described choke valve 3 other ends are communicated with described evaporimeter 2 one ends by pipeline, and described evaporimeter 2 other ends are communicated with described Venturi tube 1 by pipeline.

In Fig. 1, the solid black arrow is represented the flow direction of gaseous refrigerant, and hollow arrow is represented the flow direction of granule adsorbent, and black semisolid arrow is represented the flow direction of the mixture of gaseous refrigerant and granule adsorbent.

A kind of Fluidize adsorption continuous refrigeration method may further comprise the steps:

Step 1, gaseous refrigerant I is quickened and heats through the heat exchanger heat absorption, the high-speed and high-temperature cold-producing medium;

Step 2, described high-speed and high-temperature cold-producing medium is caused the desorption bed with the granule adsorbent II that is adsorbed with cold-producing medium mix mutually, described high-speed and high-temperature cold-producing medium makes described granule adsorbent II desorption by heating and fluidization, gaseous refrigerant and granule adsorbent I;

Step 3, described gaseous refrigerant and described granule adsorbent I are carried out gas solid separation, described granule adsorbent I enters adsorbent bed circulation absorption, described gaseous refrigerant splits into gaseous refrigerant I and gaseous refrigerant II, and described gaseous refrigerant I returns the heat absorption that circulates in the step 1 and heats;

Step 4, described gaseous refrigerant II enter the cooling of refrigerating part release heat, get gaseous refrigerant III, and described refrigerating part comprises by evaporimeter, choke valve, receiver and condenser;

Step 5, circulation gaseous refrigerant IV mix with described gaseous refrigerant III through acceleration, get gaseous refrigerant V, described gaseous refrigerant V mixes at described adsorbent bed with described granule adsorbent I, described gaseous refrigerant V makes described granule adsorbent I cooling absorption refrigeration agent and fluidization, and gaseous refrigerant IV and granule adsorbent II must circulate;

Step 6, described circulation gaseous refrigerant IV and described granule adsorbent II are carried out gas solid separation, it is recycling that described circulation gaseous refrigerant IV returns step 5, and described granule adsorbent II returns step 2 circulation desorption by heating and fluidization.

The workflow of this system is: after the part refrigerant gas is pressurizeed by compressor 13, heat up through heat exchanger 14 again, enter desorption bed 12 again, the refrigerant gas of high temperature and high speed fully contacts and makes its fluidization in adsorbent bed 12 bottoms with the adsorbent that is adsorbed with a large amount of cold-producing mediums that separates from gas-solid separator 8, be the gas feed status, the mixture of cold-producing medium and adsorbent is moved in the process at top by desorption bed 12 bottoms, and adsorbent heats up its inner cold-producing medium desorption that adsorbs is come out;

The gas-solid mixture that comes out from desorption bed 12 enters and carries out gas in the gas-solid separator 9 and separate with solid, solid adsorbent enters adsorbent bed 7 bottoms by the road, gaseous refrigerant is by vacuum valve (10,11) regulate the back and divide two-way, one the tunnel returns compressor 13, heat exchanger 14, serve as thermophore, other one road cold-producing medium (equaling the amount of isolated cold-producing medium from adsorbent on the amount) enters receiver 4 after condenser 5 condensations, after choke valve 3 decompressions, enter evaporimeter 2 again, liquid refrigerant absorbs external heat in evaporimeter 2, become gas through evaporation, and through Venturi tube 1 with enter adsorbent bed 7 bottoms after the high-speed gas that comes out from compressor 6 mixes;

The gaseous refrigerant temperature of coming out through Venturi tube 1 is lower, it fully contacts mixing in adsorbent bed 7 bottoms with adsorbent behind 9 li desorptions of separating of gas-solid separator, and make the adsorbent stream formation gas, be the gas feed status, in gas-solid mixture moves upward process, finish adsorbent cooling adsorption process; After gas-solid separator 8 separated, gas turned back to compressor 6 from 7 li gas-solid mixtures that come out of adsorbent bed, and the gas refrigerant in entering Venturi tube 1 and come flash-pot 2 after pressurization mixes; The adsorbent that is adsorbed with cold-producing medium that comes out from gas-solid separator 8 enters desorption bed 12 bottoms.

Cold-producing medium is as heat (cold) matchmaker and carrier, directly with contacted by its fluidised adsorbent, and the realization heat exchanging tampering carries out simultaneously in contact process.

Adsorbent by adsorbent bed and desorption bed and constantly circulation, is realized continuous absorption and desorption successively.

Adsorbent bed and desorption bed double bed cooperate, and make continuous desorption and absorption be achieved, thereby reach continuous cooling or heat.

Refrigerant gas had both served as heat (cold) matchmaker and had directly contacted with adsorbent, served as again to carry gas and carry adsorbent secretly to make its fluidization, had both improved the heat and mass ability between adsorbent and cold-producing medium, adsorbent can be flowed with it realize continuous cooling.

Of particular note: but Fluidize adsorption continuous refrigeration system of the present invention also fluidization absorption heat continuously.

Should be noted that at last: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement the specific embodiment of the present invention; And not breaking away from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope that the present invention asks for protection.

Claims

1, a kind of Fluidize adsorption continuous refrigeration system, comprise the refrigerating part of forming by evaporimeter (2), choke valve (3), receiver (4), condenser (5), it is characterized in that: this continuous refrigeration system also comprises the absorbed portion that makes adsorbents adsorb cold-producing medium and cooling, and adsorbent is heated up and with the desorption part of cold-producing medium desorption;

Described absorbed portion comprises Venturi tube (1), first compressor (6), adsorbent bed (7) and first gas-solid separator (8);

Described desorption portion branch comprises second gas-solid separator (9), first vacuum valve (10) and second vacuum valve (11), desorption bed (12), heat exchanger (14) and second compressor (13);

Wherein, described second vacuum valve (11) one ends are communicated with described second compressor (13) one ends, and described second compressor (13) other end is communicated with described heat exchanger (14) one ends, and described heat exchanger (14) other end is communicated with described desorption bed (12) bottom;

Described desorption bed (12) top is communicated with described second gas-solid separator (9) import, described second gas-solid separator (9) gas vent is communicated with described second vacuum valve (11) other end and described first vacuum valve (10) one ends respectively, and the outlet of described second gas-solid separator (9) solid particle is communicated with described adsorbent bed (7) bottom;

Described adsorbent bed (7) top is communicated with described first gas-solid separator (8) import, the outlet of described first gas-solid separator (8) solid particle is communicated with described desorption bed (12) bottom, and described first gas-solid separator (8) gas vent is communicated with described first compressor (6) one ends;

Described first compressor (6) other end is communicated with described Venturi tube (1) import, and described Venturi tube (1) outlet is communicated with described adsorbent bed (7) bottom;

Described first vacuum valve (10) other end is communicated with described condenser (5) one ends, described condenser (5) other end is communicated with described receiver (4) one ends, described receiver (4) other end is communicated with described choke valve (3) one ends, described choke valve (3) other end is communicated with described evaporimeter (2) one ends, and described evaporimeter (2) other end is communicated with described Venturi tube (1).