CN212390645U

CN212390645U - Absorption refrigeration system combined with siphon evaporator

Info

Publication number: CN212390645U
Application number: CN202020431732.7U
Authority: CN
Inventors: 祝令辉; 姚传辉
Original assignee: Pupan Energy Technology Research Institute Beijing Co ltd
Current assignee: Anhui Pupan Energy Technology Co ltd
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2021-01-22
Anticipated expiration: 2030-03-30

Abstract

The utility model belongs to the technical field of absorb the refrigeration, specifically be an absorption refrigerating system who combines hydrocone type evaporimeter, this system includes absorber, generator, condenser and hydrocone type evaporimeter, and in the condenser passed through the feed liquor pipe and leads to the hydrocone type evaporimeter with liquid ammonia, the last decompression governing valve that is equipped with of feed liquor pipe was equipped with in the hydrocone type evaporimeter, was equipped with the level gauge in the hydrocone type evaporimeter, and the level gauge passes through PLC and decompression governing valve electric connection control decompression governing valve action. The utility model discloses when combining the siphon-type evaporator and using as the system evaporator in absorbing refrigerating system, improve the level control of siphon-type evaporator for siphon-type evaporator matches absorption refrigerating system more, and then has improved the holistic performance of system.

Description

Absorption refrigeration system combined with siphon evaporator

Technical Field

The utility model belongs to the technical field of absorb the refrigeration, specifically be an absorption refrigerating system who combines hydrocone type evaporimeter.

Background

The thermosyphon evaporator is designed by adopting a thermosyphon principle, the thermosyphon is actually a thermal circulation motion, the thermosyphon evaporator utilizes the height difference and the density difference of fluid as the power of the fluid circulation, belongs to auxiliary equipment of a gravity liquid supply system, and has the advantages of high heat transfer efficiency, compact structure, light weight, convenient installation and the like. The thermosiphon evaporator needs to be provided with the liquid level control device on the enterprise separator in the use process, so that when the working medium solution is introduced, the thermosiphon evaporator can keep a stable liquid level, and the normal work of the thermosiphon evaporator is ensured.

At present, a common liquid level control device applied to a thermosyphon evaporator generally comprises a ball float valve and a PMFL/PMFH liquid level control valve, wherein in the working process, the ball float valve compresses a spring in the PMFL/PMFH liquid level control valve through a guide pipe according to the change action of the liquid level height, so that the opening and closing states of the PMFL/PMFH liquid level control valve are realized;

in particular, in the absorption refrigeration system, after ammonia gas in the absorber is continuously absorbed, the liquid level in the thermosiphon evaporator continuously rises along with the liquid ammonia continuously entering the thermosiphon evaporator, even overflows the ball float valve, and further the complete closing state cannot be reached. In addition, after the spring of the air valve core is compressed, when the liquid level is lowered, the PMFL/PMFH liquid level control valve controlled by the floating ball valve can be instantly switched to the minimum opening state under the action of the spring, and at the moment, the liquid ammonia interception amount is overlarge, so that the liquid ammonia is not beneficial to flowing;

therefore, there is a need for an improved liquid level control device that enables a thermosiphon evaporator to be stably and efficiently integrated with an absorption refrigeration system to enhance the performance of the absorption refrigeration system.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a combine absorption refrigerating system of hydrocone type evaporimeter combines the advantage of hydrocone type evaporimeter and absorption refrigerating system to liquid level control to the hydrocone type evaporimeter improves, so that better being applied to absorbs refrigerating system, and then improves the performance that absorbs refrigerating system.

In order to achieve the above object, the utility model provides an absorption refrigerating system who combines hydrocone type evaporimeter, this system include absorber, generator, condenser and hydrocone type evaporimeter, and in the condenser passed through the feed liquor pipe and channels into the hydrocone type evaporimeter with liquid ammonia, the last decompression governing valve that is equipped with of feed liquor pipe was equipped with in the hydrocone type evaporimeter, was equipped with the level gauge in the hydrocone type evaporimeter, and the level gauge passes through PLC and decompression governing valve electric connection control decompression governing valve action.

Preferably, the rich ammonia solution outlet of the absorber is connected with the rich ammonia solution inlet of the generator through a pipeline, the gaseous ammonia outlet of the generator is connected with the condenser through a pipeline, the gaseous ammonia outlet of the siphon evaporator is connected with the gaseous ammonia inlet of the absorber through a pipeline, and the lean ammonia solution outlet of the generator is connected with the lean ammonia solution inlet of the absorber through a pipeline.

Preferably, the siphon-type evaporator comprises an evaporator and a gas-liquid separator fixed on the evaporator, the liquid level meter is mounted on the gas-liquid separator, and one end of the liquid inlet pipe is connected to the gas-liquid separator.

Preferably, the height of the joint of the liquid inlet pipe and the gas-liquid separator is less than the liquid level of the solution in the gas-liquid separator.

Preferably, the sum of the volume of the gas-liquid separator and the volume of the evaporator tube pass is greater than the volume of the condenser tube pass or the shell pass.

Preferably, a return pipeline is arranged between the tube side outlet of the evaporator and the absorber, a first switch valve is installed on the return pipeline, and a second switch valve is installed on a pipeline between the gas ammonia outlet of the gas-liquid separator and the gas ammonia inlet of the absorber.

The utility model discloses at least, following technological effect has:

through adopting the siphon-type evaporator, when making this absorption refrigerating system's liquid ammonia take place the phase transition and cool down the secondary refrigerant, very big improvement the heat transfer effect between the two, and then can improve whole absorption refrigerating system's performance, especially, improve the liquid level control of traditional siphon-type evaporator, utilize level gauge and pressure reduction regulating valve to replace the combination of ball-cock assembly and PMFL liquid level control valve in the traditional mode, can effectively the defect of national currency ball-cock assembly, make the leading-in siphon-type evaporator in-process of liquid ammonia, more gentle, liquid level control is more sensitive, and through the action signal value of adjusting the level gauge, make the liquid level of liquid ammonia in the siphon-type evaporator adjust as required.

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 view of an absorption refrigeration system incorporating a siphon evaporator of the present invention.

In the figure, an absorber 1, a generator 2, a condenser 3, a siphon evaporator 4, an evaporator 41, a gas-liquid separator 42, a liquid inlet pipe 5, a pressure reducing regulating valve 6, a liquid level meter 7 and a return pipeline 8 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 utility model provides a combine absorption refrigerating system of hydrocone type evaporimeter, this system is for current absorption refrigerating system, mainly is that evaporator 41 in the current absorption refrigerating system has been replaced with hydrocone type evaporimeter 4, and then combines the advantage that the heat exchange efficiency of hydrocone type evaporimeter 4 is high with absorption refrigerating system, and then improves whole absorption refrigerating system's performance.

The absorption refrigeration system combined with the siphon evaporator comprises an absorber 1, a generator 2, a condenser 3 and a siphon evaporator 4, wherein an ammonia-rich solution outlet of the absorber 1 is connected with an ammonia-rich solution inlet of the generator 2 through a pipeline, a gas ammonia outlet of the generator 2 is connected with the condenser 3 through a pipeline, a gas ammonia outlet of the siphon evaporator 4 is connected with a gas ammonia inlet of the absorber 1 through a pipeline, a poor ammonia solution outlet of the generator 2 is connected with a poor ammonia solution inlet of the absorber 1 through a pipeline, the condenser 3 introduces liquid ammonia into the siphon evaporator 4 through a liquid inlet pipe 5, a pressure reduction regulating valve 6 is arranged on the liquid inlet pipe 5, a liquid level meter 7 is arranged in the siphon evaporator 4, the liquid level meter 7 is electrically connected with the pressure reduction regulating valve 6 through a PLC (programmable logic controller), the siphon evaporator 4 specifically comprises an evaporator 41 and a gas-liquid separator 42 fixed on the evaporator 41, the liquid level meter 7 is installed on the gas-liquid separator 42, one end of the liquid inlet pipe 5 is connected to the gas-liquid separator 42, the gas-liquid separator 42 is connected with the tube side of the evaporator 41 through a downcomer and used for enabling liquid ammonia in the gas-liquid separator 42 to enter the evaporator 41 for heat exchange with a heat source, one end of the evaporator 41 is connected with the gas-liquid separator 42 through a riser, the liquid ammonia is enabled to enter the gas-liquid separator 42 through the riser after being subjected to heat exchange with the heat source in the evaporator 41 to become bubbles, gas-liquid separation is carried out in the gas-liquid separator 42 through the riser, and the height of the connection position of the liquid inlet pipe 5 and the gas-liquid.

This scheme is in the use, through the height value of liquid level when presetting the 7 actions of trigger level gauge on PLC, when the system operation, level gauge 7 can monitor the liquid level in vapour and liquid separator 42 in real time, and can choose PID regulation mode for use, make the liquid level before reaching the critical value, decompression governing valve 6 can carry out intercepting of appropriate range to liquid ammonia, and, decompression effect through decompression governing valve 6, make liquid ammonia advance into vapour and liquid separator 42 before in the feed liquor pipe 5, pressure reduction, reduce the velocity of flow of liquid ammonia, reduce the flow of liquid ammonia in the unit interval, and then better liquid level to in the vapour and liquid separator 42 is controlled.

Further, the sum of the volume of the gas-liquid separator 42 and the tube pass volume of the evaporator 41 is greater than the volume of the tube pass or the shell pass of the condenser 3, so that the action value of the liquid level meter 7 is preset, when the liquid ammonia is in the tube pass or the shell pass of the condenser 3, the liquid ammonia in the condenser 3 can be completely introduced into the siphon evaporator 4 for temporary storage, further, the liquid level meter 7 is matched with the decompression regulating valve 6 under the control of the PLC, the action value of the liquid level meter 7 is preset, so that the whole siphon evaporator 4 can be used for filling the liquid ammonia, the liquid ammonia storage tank is used, and then the condenser 3 and other devices in the system are replaced.

As a preferable scheme, a return pipeline 8 is arranged between the tube side outlet of the evaporator 41 and the absorber 1, a first switch valve is arranged on the return pipeline 8, a second switch valve is arranged on a pipeline between the gas ammonia outlet of the gas-liquid separator 42 and the gas ammonia inlet of the absorber 1, so that when the system causes the working medium to enter the siphon evaporator 4 due to misoperation, the performance of the siphon evaporator 4 is affected, for example, the working medium introduced into the absorber 1 is excessive, the excessive working medium flows into the siphon evaporator 4 through the pipeline between the gas ammonia outlet of the gas-liquid separator 42 and the absorber 1, and the absorbent in the working medium affects the evaporation of the liquid ammonia and further affects the performance of the siphon evaporator 4, therefore, the arrangement is that after the misoperation, the first switch valve is opened, the second switch valve and the decompression regulating valve 6 are both closed, along with the heat transfer not only in the hydrocone type evaporimeter 4, its internal pressure can constantly increase, and then can pass through back flow 8 with the inside working medium of hydrocone type evaporimeter 4 and liquid ammonia solution and leading-in to the absorber 1 in, realize the inside evacuation of hydrocone type evaporimeter 4, accomplish the system and restore, and whole repair process convenient and fast, security height.

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 present 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, either in the above teachings or as applied to the relevant art or knowledge. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. An absorption refrigeration system incorporating a siphonic evaporator, comprising: the system comprises an absorber, a generator, a condenser and a siphon evaporator, wherein the condenser introduces liquid ammonia into the siphon evaporator through a liquid inlet pipe, a pressure reducing regulating valve is arranged on the liquid inlet pipe, a liquid level meter is arranged in the siphon evaporator, and the liquid level meter is electrically connected with the pressure reducing regulating valve through a PLC (programmable logic controller) to control the action of the pressure reducing regulating valve.

2. The absorption refrigeration system incorporating a siphonic evaporator according to claim 1, wherein: an ammonia-rich solution outlet of the absorber is connected with an ammonia-rich solution inlet of the generator through a pipeline, a gas ammonia outlet of the generator is connected with the condenser through a pipeline, a gas ammonia outlet of the siphon evaporator is connected with a gas ammonia inlet of the absorber through a pipeline, and a poor ammonia solution outlet of the generator is connected with a poor ammonia solution inlet of the absorber through a pipeline.

3. The absorption refrigeration system incorporating a siphonic evaporator according to claim 2, wherein: the siphon evaporator comprises an evaporator and a gas-liquid separator fixed on the evaporator, the liquid level meter is installed on the gas-liquid separator, and one end of the liquid inlet pipe is connected to the gas-liquid separator.

4. The absorption refrigeration system incorporating a siphonic evaporator according to claim 3, wherein: the height of the joint of the liquid inlet pipe and the gas-liquid separator is less than the height of the liquid level of the solution in the gas-liquid separator.

5. The absorption refrigeration system incorporating a siphonic evaporator according to claim 3, wherein: the sum of the volume of the gas-liquid separator and the tube pass volume of the evaporator is larger than the volume of the tube pass or the shell pass of the condenser.

6. The absorption refrigeration system incorporating a siphonic evaporator according to claim 3, wherein: a return pipeline is arranged between the tube pass outlet of the evaporator and the absorber, a first switch valve is mounted on the return pipeline, and a second switch valve is mounted on a pipeline between the gas ammonia outlet of the gas-liquid separator and the gas ammonia inlet of the absorber.