CN111795513B

CN111795513B - Two-state thermal drive refrigerating system

Info

Publication number: CN111795513B
Application number: CN202010546841.8A
Authority: CN
Inventors: 祝令辉
Original assignee: Pupan Energy Technology Research Institute Beijing Co ltd
Current assignee: Anhui Pupan Energy Technology Co ltd
Priority date: 2020-06-16
Filing date: 2020-06-16
Publication date: 2021-10-22
Anticipated expiration: 2040-06-16
Also published as: CN111795513A

Abstract

The invention belongs to the technical field of waste heat absorption refrigeration, and particularly relates to a two-state heat-driven refrigeration system which comprises a generator, an absorber, an evaporator and a condenser, wherein a lean solution pipeline is arranged between the generator and the absorber, and a two-state working medium conveying mechanism is arranged between the lean solution pipeline and the generator, wherein: binary state working medium conveying mechanism includes transmission portion and at least one refines dispersion portion, refines dispersion portion and includes the casing, and the casing inner chamber is fixed with the stator, and the stator surface has evenly seted up the shear groove, is equipped with the diameter in the stator and is less than stator and rotatable rotor, is fixed with a rotor shaft that runs through the casing on the rotor, and transmission portion includes and is located the fixed transmission shaft of absorber one end with the rotor shaft, and the one end of transmission shaft is fixed with the impeller that is located the poor solution pipeline. The invention not only effectively solves the problem that the existing absorption refrigeration system is incompatible with the solid working medium generated by rich solution analysis, but also greatly improves the performance of the system.

Description

Two-state thermal drive refrigerating system

Technical Field

The invention belongs to the technical field of waste heat absorption refrigeration, and particularly relates to a two-state heat-driven refrigeration system.

Background

Absorption refrigeration utilizes certain pairs of working substances with specific properties to produce a change in state of a substance by absorption and release of one substance to another, accompanied by endothermic and exothermic processes. The absorption type refrigerating device comprises a generator, a condenser, an evaporator, an absorber, a circulating pump, a throttle valve and other components, wherein the working medium comprises a refrigerant for preparing cold quantity and an absorbent for absorbing and desorbing the refrigerant, and the working medium and the absorbent form a working medium pair which can recover industrial waste heat and utilize the waste heat as a refrigerating heat source.

At present, in the operation process of a common waste heat absorption refrigeration system, when a rich solution exchanges heat with an introduced heat source, the rich solution needs to be prevented from separating out solid working medium to cause blockage, and in order to avoid the occurrence of the situation, a common mode in the prior art is to control the temperature of the heat source introduced into a generator and prevent working medium solution from being excessively heated and analyzing in the generator to form the solid working medium, so that the upper limit of the temperature of the heat source of the generator is generally set to prevent working medium liquid in the generator from analyzing to generate the solid working medium due to the overhigh temperature of the heat source, once the upper limit of the temperature of the generator is set, related equipment needs to be adopted to monitor the temperature of the waste heat source introduced into the generator constantly, and data obtained by monitoring is led into an electric control system of the absorption refrigeration system in real time, so that the difficulty is increased for constructing the system, and the recycling range of the heat source is limited, the application range of the absorption refrigeration system is limited, the development of the absorption refrigeration system is not facilitated, especially when an enterprise with the heat source temperature exceeding the upper limit temperature needs to recycle the part of heat sources, the heat sources with higher temperature need to be pre-cooled, and the difficulty and the cost of system construction are inevitably increased;

therefore, how to effectively treat the solid working medium precipitated in the waste heat absorption refrigeration system is a problem to be treated urgently in the existing waste heat absorption refrigeration system.

Disclosure of Invention

The invention aims to provide a two-state thermal driving refrigerating system, which not only effectively solves the problem that the existing absorption refrigerating system cannot be compatible with solid working media generated by analyzing working medium solution, but also greatly improves the performance of the system.

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

the utility model provides a binary state heat drive refrigerating system which characterized in that, includes generator, absorber, evaporimeter and condenser, the generator with be equipped with poor solution pipeline between the absorber, poor solution pipeline with be equipped with binary state working medium conveying mechanism between the generator, wherein:

the binary working medium conveying mechanism comprises a transmission part and at least one refining dispersion part, the refining dispersion part comprises a shell with an inverted cone frustum-shaped bottom, a stator is fixed in an inner cavity of the shell, a shearing groove is uniformly formed in the surface of the stator, a rotor which is smaller than the stator in diameter and can rotate is coaxially arranged in the stator, a rotor rotating shaft penetrating through the shell is coaxially fixed on the rotor, and the shell is connected with a lean solution outlet of the generator through an inlet pipe which is coaxial with the rotor;

at least one refines the dispersion portion and distributes in proper order along the axial of import pipe, refines through water conservancy diversion mouth intercommunication between the casing of dispersion portion two adjacent, and the internal diameter of water conservancy diversion mouth is less than the internal diameter of rotor, and transmission portion includes and is located the coaxial fixed transmission shaft of absorber one end with the rotor pivot, and the one end of transmission shaft is fixed with the impeller that is located the lean solution pipeline.

Preferably, the generator is located above the absorber.

Preferably, the generator is horizontal, a plurality of baffle plates are arranged in the shell pass of the generator at intervals, a gap is formed between one end of each baffle plate and the shell pass, a snake-shaped channel for flowing working medium liquid is formed by the gaps and the shell pass space between every two adjacent baffle plates, a gap is formed between the bottom of one end of each baffle plate located in the gap and the inner wall of the bottom of the shell pass, and two ends of the inner cavity of each gap are respectively located on two sides of the central line of the shell pass.

Preferably, the inner wall of the bottom of the shell side of the generator is inclined downwards relative to the other end of the lean solution outlet at one end of the lean solution outlet.

Preferably, the end of the baffle at the gap is inclined to the side of the lean solution outlet.

Preferably, the inner wall of the bottom of the shell side of the generator is located at the downward concave conical part of the edge of the lean solution outlet.

The invention has at least the following technical effects:

1. can carry solid-state working medium and liquid working medium simultaneously through binary state working medium conveying mechanism to can carry out high-speed shear dispersion to solid-liquid binary state working medium, binary state working medium can not cause phenomenons such as generator or pipeline jam, even make to produce solid-state working medium in the generator, absorb refrigerating system also normal operating, compared with prior art, can only carry out the transport of liquid working medium and stably control the waste heat source that the generator introduced in order to prevent to produce solid-state working medium, this scheme has apparent effect.

2. After the rich solution is used for separating out the solid working medium, the mixture of the lean solution and the solid working medium is introduced into the absorber, and compared with the pure lean solution in the prior art, the mixture of the lean solution and the solid working medium has better absorption efficiency of a gas-phase refrigerant, so that the working efficiency of the absorber is greatly improved, and the performance of the whole system is greatly improved.

3. In the process that the rich solution generates the solid working medium in the generator, compared with the prior art, the amount of the precipitated refrigerant is larger, so that the gas-phase refrigerant generated in the generator is increased compared with the prior art, and the refrigeration efficiency of the waste heat absorption refrigeration system is improved.

4. In the process of analyzing the rich solution in the generator and forming the solid working medium, compared with the prior art, more heat needs to be absorbed, so that the heat exchange between the rich solution in the generator and a heat source is more, and the utilization efficiency of waste heat is improved.

5. The heat absorbed in the process of separating out the solid working medium through the rich solution is large, compared with the prior art, in order to prevent the solid working medium from being separated out and control the upper limit of the temperature of the waste heat source in a lower range, the scheme can improve the upper limit of the temperature of the waste heat source, expand the waste heat utilization range of the waste heat absorption refrigeration system, and has higher economic value and wider application value.

6. Through the negative pressure effect that the high-speed rotation of rotor produced in the binary state working medium conveying mechanism, can be with the effectual generator of taking out of solid-state working medium and poor solution mixture in the generator to do not influence the motion of gaseous state refrigerant, make under the circumstances that the guarantee waste heat absorption refrigerating system wholeness can be stable, ensure that solid-state working medium can not block up the generator.

7. The impeller is driven to rotate when the binary working medium flows under the action of the pressure difference between the generator and the absorber, so that the kinetic energy of the binary working medium flowing is converted into a power source for high-speed shearing of the binary working medium by high-speed rotation of the rotor, the operation of the binary working medium conveying mechanism is free from consuming any external energy, the kinetic energy of the fluid is effectively recovered, and the binary working medium conveying mechanism has the advantages of environmental protection, energy conservation and strong practicability.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic diagram of a waste heat absorption refrigeration system of the present invention;

FIG. 2 is a schematic view of the two-state working medium delivery mechanism of FIG. 1 according to the present invention;

FIG. 3 is a schematic view of a binary working medium conveying mechanism according to the present invention, in which the number of the refining and dispersing units is one;

fig. 4 is an enlarged view at a in bitmap 1.

In the figure, a generator 1, an absorber 2, an evaporator 3, a condenser 4, a lean solution pipeline 5, a binary working medium conveying mechanism 6, a shell 61, a stator 62, a rotor 63, an impeller 64, a shearing groove 65, a transmission shaft 66, an inlet pipe 67, an outlet pipe 68, a rotor rotating shaft 69, a baffle plate 101, a notch 102 and a pressure reducing valve 7 are arranged.

Detailed Description

Embodiments of the present application will be described in detail with reference to the drawings and examples, so that how to implement technical means to solve technical problems and achieve technical effects of the present application can be fully understood and implemented.

As shown in fig. 1, the present invention provides a two-state heat-driven refrigeration system, which includes a generator 1, an absorber 2, an evaporator 3 and a condenser 4, wherein a lean solution pipeline 5 is arranged between the generator 1 and the absorber 2, the absorber 2 introduces a rich solution in the absorber 2 into the generator 1 through a rich solution pump and a rich solution pipeline to exchange heat with an introduced waste heat source, so that the rich solution generates a gas-phase refrigerant, and a two-state working medium conveying mechanism 6 is arranged between the lean solution pipeline 5 and the generator 1, wherein:

the two-state working medium conveying mechanism 6 comprises a transmission part and at least one refining dispersion part, as shown in fig. 2, a schematic diagram when the refining dispersion part is one is given, as shown in fig. 3, a schematic diagram when the refining dispersion part is three is given, the refining dispersion part comprises a shell 61, the bottom of the shell 61 is in an inverted cone frustum shape, a stator 62 is fixed in the inner cavity of the shell, a shear groove 65 is uniformly formed in the surface of the stator 62, a rotor 63 which is smaller than the stator 62 in diameter and can rotate is arranged in the stator 62, a rotor rotating shaft 69 penetrating through the shell 61 is fixed on the rotor 63, negative pressure is generated along the axial direction when the rotor 63 rotates at high speed, external materials are sucked, the materials are thrown out under the action of centrifugal force after entering a gap between the rotor 63 and the stator 62 and leave the stator 62 through the shear groove 65, and in the process, the materials are sheared at high speed and refined and dispersed, the material is refined and dispersed from the stator 62 and thrown out, and then falls into the shell 61 to be collected, and waits for being discharged from the shell 61, and further, the material to be treated continuously enters into the treatment, and the treated material is discharged in time, thereby forming a stable and continuous material refining and dispersing process, the shell 61 is connected with the poor solution outlet of the generator 1 through the inlet pipe 67 coaxial with the rotor 63, at least one refining and dispersing part is distributed along the axial direction of the inlet pipe 67 in sequence, the shells 61 of two adjacent refining and dispersing parts are communicated through the flow guide opening, the inner diameter of the flow guide opening is smaller than the inner diameter of the rotor 63, the inlet pipe 67 is used as an introducing passage for the material entering into the shell 61 and being sucked into the stator 62 and the rotor 63, namely, after the rich solution in the generator 1 is heated to generate gas-phase refrigerant, the formed mixture of the poor solution and the solid working medium is introduced into the two-state working medium conveying mechanism 6, the shell 61 is connected with the absorber 2 through an outlet pipe 68, the outlet pipe 68 is used for discharging the refined and dispersed materials out of the two-state working medium conveying mechanism 6 in time and guiding the refined and dispersed materials into the absorber 2, namely, guiding the refined and uniformly dispersed mixture of the lean solution forming pulp and the solid working medium into the absorber 2, absorbing the gas-phase refrigerant introduced into the absorber 2 from the evaporator 3 and reforming the rich solution in the absorber 2, the lean solution pipeline 5 is provided with a pressure reducing valve 7 for controlling the pressure in the absorber 2, the transmission part comprises a transmission shaft 66 fixed at one end of the absorber 2 and a rotor rotating shaft 69, one end of the transmission shaft 66 is fixed with an impeller 64 positioned in the lean solution pipeline 5, the stator 62, the rotor 63, the rotor rotating shaft 69 and the transmission shaft 66 are coaxially arranged, when the impeller 64 rotates the impeller 64, the impeller 64 drives the rotor rotating shaft 69 to rotate through the transmission shaft 66, and further drives the rotor 63 to rotate, so that when the system of the invention is started up and operated, the precipitation process of the solid working medium is a continuous production process, especially when the system is started up, the quantity of the solid working medium produced in the generator 1 is less, therefore, the solid working medium is introduced into the binary working medium in the poor solution pipeline 5, the poor solution quantity is larger, the formed fluid impacts the impeller 64 to drive the impeller 64 to rotate, after the system is stably operated, the quantity of the solid working medium in the binary working medium is increased, at the moment, the binary working medium conveying mechanism can carry out a high-shear process of refining and dispersing the solid working medium, the binary working medium is changed into a fluid similar to slurry, at the moment, the kinetic energy of the fluid can be converted into an energy source when the rotor 63 rotates, the operation of the binary working medium conveying mechanism 6 does not need to introduce other energy sources outside the system, when more than one refining and dispersing part is used, the plurality of refining and dispersing parts can carry out high-shear treatment on the binary working medium in turn, after the upper stage refining dispersion part processes the binary working medium, the binary working medium enters the next refining dispersion mechanism through the flow guide port to be continuously sheared, and the effect of refining and dispersing the binary working medium is improved.

The scheme of the invention comprises the following steps:

firstly, when the rich solution in the generator 1 is heated, and a large amount of gas-phase refrigerant is separated from the interior of the generator, the rich solution becomes a binary working medium mixed by lean solution and solid working medium, at this time, in the operation process of the binary working medium conveying mechanism 6 in the system, the rotor 63 rotates to generate a certain negative pressure, which is helpful for the solid working medium formed after the refrigerant is resolved in the generator 1 to be absorbed along with the formed lean solution at the same time, so that the binary working medium is effectively absorbed between the stator 62 and the rotor 63, the rotor 63 rotated at high speed is matched with the shearing groove 65 to carry out high-speed shearing process, the binary working medium is processed into a mixture similar to slurry, the mixture is discharged from the outlet pipe 68 and is introduced into the absorber 2, the gas-phase refrigerant introduced from the evaporator 3 in the absorber 2 is absorbed, and the rich solution is formed again in the absorber 2, and is introduced into the generator 1 again through a rich solution pipeline and a rich solution pump, a recycling process of a refrigerant is formed, in the whole process, the binary working medium is conveyed and processed by the binary working medium conveying mechanism 6, so that the binary working medium can circulate in the system smoothly without resistance, and when a rich solution in the generator 1 is heated greatly, the whole system can still run for a long time and stably even under the condition of resolving to form the solid working medium, and the effect of waste heat absorption refrigeration is realized, therefore, after the scheme is adopted, the phenomenon that the generator 1 and a pipeline are blocked due to the fact that the temperature of an introduced waste heat source is too high and the rich solution resolves to form the solid working medium is avoided, and the technical difficulty that the solid working medium is blocked in the waste heat absorption refrigeration system and finally the system cannot run is effectively solved;

in the process of generating the solid working medium by utilizing the rich solution, the amount of the precipitated gas-phase refrigerant is larger, so that the analysis efficiency of the refrigerant is improved, the amount of the refrigerant circulating in the system is increased, the refrigeration efficiency is improved, and the refrigeration capacity can be increased;

thirdly, more heat needs to be absorbed in the process of forming the solid working medium by the rich solution, the utilization rate of a waste heat source can be improved, the generator 1 can be allowed to introduce the waste heat source with higher temperature, compared with the prior art, in order to prevent the solid working medium from being generated in the generator 1, the temperature of the introduced waste heat source is limited, the temperature of the heat source is prevented from being too high, the heat source exceeding the upper limit is cooled and then sent into the generator 1, or the waste of resources is caused by emptying, the scheme of the invention has obvious advantages, the range of the usable heat source of the generator 1 can be enlarged, the waste heat utilization rate is enhanced, the resources are saved, and for some enterprises with higher heat source temperature, the technological process of cooling the heat source is omitted, and the integral composition and cost of the system during application are simplified.

Fourthly, because the precipitation effect of the refrigerant is better than that of the prior art, compared with the prior art, under the condition of the same precipitation amount of the refrigerant, the amount of the rich solution needing to be conveyed by the rich solution pump in the rich solution pipeline is smaller, and the circulation multiplying power can be reduced, so that the working load of the rich solution pump can be reduced, the high-load long-term operation can be avoided, the integral stability and safety of the system can be improved, and the energy consumption of the rich solution pump can also be reduced.

Fifthly, in the scheme of the invention, because the rich solution analysis efficiency in the generator 1 is greatly improved and the solid working medium is formed, and the mixture of the solid working medium and the poor solution enters the absorber 2 after being processed by the two-state working medium conveying mechanism 6, compared with the absorption of the poor solution to the gas-phase refrigerant in the prior art, the mixture of the poor solution and the solid working medium has stronger absorption efficiency to the gas-phase refrigerant, and the absorption efficiency of the absorber 2 is greatly improved.

As shown in fig. 1, the generator 1 is located above the absorber 2, and is arranged in such a way that the efficiency of solid working medium delivery is increased by using the liquid level difference.

Wherein, combine fig. 1 and fig. 4, generator 1 is horizontal, the interval is provided with a plurality of baffling boards 101 in generator 1's shell side, the clearance has between baffling board 101's one end and the shell side, a plurality of clearances, shell side space between two adjacent baffling boards 101 forms one and lets the snakelike passageway that working medium liquid flows, baffling board 101 is located and has breach 102 between the bottom of clearance one end and the bottom inner wall of shell side, the both ends of breach 102 inner chamber are located the both sides of shell side central line respectively, make after solid-state working medium forms, can assemble in the breach 102 scope, at this moment, solution when flowing in generator 1, solid-state working medium can be better follows solution flow, make things convenient for the better timely discharge of the solid-state working medium in generator 1.

Further, the one end that generator 1 shell side bottom inner wall is located the poor solution export is for its other end downward sloping, baffling board 101 is located the one end in clearance and to the one side slope of poor solution export, so set up, make solid-state working medium move to generator 1's poor solution export one side more easily, improve solid-state working medium discharge generator 1's efficiency, generator 1 shell side bottom inner wall is located poor solution export edge and is the toper portion of undercut, so set up, make solid-state working medium when following the poor solution export of solution motion to generator 1, can be more quick through the poor solution export, it is too much to prevent that poor solution export from accumulating solid-state working medium, cause the jam and influence solid-state working medium's discharge efficiency.

In summary, compared with a series of measures adopted in the prior art, such as controlling the upper limit of the temperature of the waste heat source or preventing the generator 1 or the lean solution pipeline 5 from being blocked by the solid working medium by introducing the liquid working medium into the lean solution pipeline 5 to flush the solid working medium, the invention combines the high-speed shearing action of the rotor 63 and the stator 62 on the solid working medium and the optimized design of the generator 1 through a smart concept and the matching of the shear groove 65 on the rotor 63 and the stator 62, so that the waste heat absorption refrigeration system is not influenced by the solid working medium any more, and can ensure the stable and effective operation of the system through the treatment on the solid working medium, and on the basis, a series of advantages of improving the analysis efficiency of the refrigerant of the generator 1, reducing the energy consumption of the rich solution pump, expanding the waste heat utilization range of the generator 1 and the like are obtained.

As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to achieve the technical effect basically.

It is noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of additional like elements in the article or system in which the element is included.

The foregoing description shows and describes several preferred embodiments of the invention, but as before, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a binary state heat-driven refrigerating system, characterized in that, includes generator (1), absorber (2), evaporimeter (3) and condenser (4), be equipped with lean solution pipeline (5) between generator (1) and absorber (2), lean solution pipeline (5) with be equipped with binary state working medium conveying mechanism (6) between generator (1), wherein:

the binary working medium conveying mechanism (6) comprises a transmission part and at least one refining dispersion part, the refining dispersion part comprises a shell (61) with the bottom in an inverted cone frustum shape, a stator (62) is fixed in the inner cavity of the shell (61), shear grooves (65) are uniformly formed in the surface of the stator (62), a rotor (63) which is smaller than the stator (62) in diameter and can rotate is coaxially arranged in the stator (62), a rotor rotating shaft (69) penetrating through the shell (61) is coaxially fixed on the rotor (63), and the shell (61) is connected with a lean solution outlet of the generator (1) through an inlet pipe (67) which is coaxial with the rotor (63);

at least one it follows to refine the dispersion portion the axial of import pipe (67) distributes in proper order, adjacent two refine between dispersion portion's casing (61) through water conservancy diversion mouth intercommunication, the internal diameter of water conservancy diversion mouth is less than the internal diameter of rotor (63), transmission portion include with rotor pivot (69) are located absorber (2) one end coaxial fixed transmission shaft (66), the one end of transmission shaft (66) is fixed with and is located impeller (64) in lean solution pipeline (5).

2. A binary heat driven refrigeration system according to claim 1 characterized in that the generator (1) is located above the absorber (2).

3. The binary heat-driven refrigeration system according to claim 2, wherein the generator (1) is horizontal, a plurality of baffle plates (101) are arranged at intervals in a shell pass of the generator (1), a gap is formed between one end of each baffle plate (101) and the shell pass, a serpentine channel for flowing working medium liquid is formed by the gaps and a shell pass space between two adjacent baffle plates (101), a gap (102) is formed between the bottom of each baffle plate (101) at one end of the gap and the inner wall of the bottom of the shell pass, and two ends of an inner cavity of the gap (102) are respectively located on two sides of the shell pass center line.

4. A binary heat driven refrigeration system according to claim 3 wherein the inner wall of the bottom of the shell side of the generator (1) at the end of the lean solution outlet is inclined downwardly with respect to the other end.

5. A binary heat driven refrigeration system as set forth in claim 3 wherein said baffle (101) is inclined at one end of said gap to one side of said lean solution outlet.

6. A binary heat driven refrigeration system according to claim 3 wherein the inner wall of the shell side bottom of the generator (1) is in the form of a downwardly concave cone at the edge of the lean solution outlet.