CN212778148U - Refrigerating system and circulating water cooling mechanism - Google Patents
Refrigerating system and circulating water cooling mechanism Download PDFInfo
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- CN212778148U CN212778148U CN202021331358.XU CN202021331358U CN212778148U CN 212778148 U CN212778148 U CN 212778148U CN 202021331358 U CN202021331358 U CN 202021331358U CN 212778148 U CN212778148 U CN 212778148U
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Abstract
The utility model relates to a chemical production technical field provides a refrigerating system and circulating water cooling mechanism. Refrigerating system include: the water-cooled generator comprises a generator (1), wherein a refrigerant water solution is filled in the generator (1), and the generator (1) is provided with a structure capable of introducing steam to evaporate water in the refrigerant water solution to form water vapor; a condenser (2) arranged to condense water vapour discharged by the generator (1) into water; and the evaporator (3), the evaporator (3) is arranged to evaporate the water condensed in the condenser (2) to form water vapor, and the evaporator (3) is arranged to be capable of exchanging heat with a circulating water system (4). The utility model discloses a low-grade hot steam among the chemical industry system not only can be retrieved to refrigerating system, retrieves the condensate, reduces the desalted water consumption, can reduce the temperature of public work circulating water moreover, reaches the purpose that reduces circulating water consumption.
Description
Technical Field
The utility model relates to a chemical production technical field, in particular to refrigerating system and circulating water cooling mechanism.
Background
At present, the energy problem gradually becomes an important factor restricting economic development of China, energy conservation and emission reduction are main problems at present, a large amount of low-temperature waste heat exists in each production device in the chemical industry, and how to fully recycle the low-temperature waste heat obviously becomes an important measure for saving energy, reducing consumption and improving enterprise competitiveness. Particularly, for petrochemical industry and coal chemical industry of large energy consumption households, green development, scientific development and low-carbon development are greatly promoted, and the method becomes a key point for long-term survival and development of enterprises.
Further, in the production operation process of chemical enterprises, because the needs of technology heat transfer, can the by-product a large amount of remaining low pressure steam, because the hot level of these steam is lower, can't carry out recycle through simple route, most enterprises take the mode of direct blowdown to handle, especially non-heating period, low pressure steam abundance degree is more obvious, and the direct on-the-spot blowdown of low-grade steam not only causes a large amount of heat energy to be extravagant, causes factory environmental pollution moreover. On the premise of not adopting any measures, if the on-site emptying amount of steam is reduced, only the load of the system can be reduced for production, and the economic benefit is poor.
In addition, when the circulating water is operated under the working condition of summer, the environment temperature is high, the circulating water temperature is high, the required circulating water quantity is large, most chemical enterprises are forced to reduce the load for production due to the high circulating water temperature when the high-temperature period in summer is serious, and the circulating water evaporation loss is large due to the high circulating water temperature in summer. The existing circulating water cooling mainly adopts a wet cooling tower for cooling, the cooling process needs to discharge heat out of the tower through evaporation and heat exchange of water so as to cool the circulating water, but the cooling mode needs to consume a large amount of water, and the application in water-deficient areas is limited.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a refrigerating system and circulating water cooling mechanism that can utilize low-grade steam to refrigerate in order to cool down the circulating water.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
a refrigeration system comprising:
the generator is internally provided with a refrigerant water solution, and is arranged to be capable of introducing steam so as to evaporate water in the refrigerant water solution to form water vapor;
a condenser configured to condense water vapor exhausted from the generator into water; and
the evaporator is arranged to be used for evaporating the water condensed in the condenser to form water vapor, and the evaporator is arranged to be capable of exchanging heat with a circulating water system.
Optionally, the refrigeration system comprises a recovery unit comprising:
an absorber configured to receive water vapor generated within the evaporator; and
and a conveying pipeline is arranged between the heat exchanger and the generator so as to convey the refrigerant concentrated solution formed after the refrigerant aqueous solution is evaporated to the heat exchanger through the conveying pipeline, and the heat exchanger is connected with the absorber so as to exchange heat between the refrigerant concentrated solution and the refrigerant dilute solution formed in the absorber.
Optionally, a recovery pipeline for conveying the refrigerant dilute solution to the generator is further arranged between the heat exchanger and the generator.
Optionally, a first pipeline for conveying the refrigerant concentrated solution to the absorber is connected between the heat exchanger and the absorber, and a cooler is arranged on the first pipeline.
Optionally, a second pipeline for conveying the refrigerant dilute solution to the heat exchanger is connected between the absorber and the heat exchanger.
Optionally, a delivery pump is arranged on the second pipeline.
Optionally, a first opening, a second opening, and a third opening are provided on the absorber, the first opening is connected to the first pipeline, the second opening is connected to the second pipeline, and the third opening is connected to the evaporator.
Optionally, the steam introduced into the generator is low-pressure steam.
Optionally, the condenser is arranged to be drivable by the low pressure steam.
The utility model discloses the second aspect provides a circulating water cooling mechanism, including circulating water system and above-mentioned arbitrary scheme refrigerating system, the evaporimeter with circulating water system can carry out the heat exchange.
Compared with the prior art, refrigerating system have following advantage:
the utility model discloses a through letting in hot steam in to the generator among the refrigerating system, make behind the water evaporation formation vapor in the refrigerant aqueous solution pass through condenser and evaporimeter in proper order again, finally form cold vapor, in order to cool down to the water among the circulating water system, thereby not only can retrieve the low-grade hot steam among the chemical industry system, retrieve the condensate, reduce the desalted water consumption, and can reduce the temperature of public engineering circulating water, reach the consumption that reduces the circulating water, reduce the purpose of circulating water circulation volume, avoid the summer system because of the insufficient load reduction of circulating water volume simultaneously.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is a schematic structural diagram of a circulating water cooling mechanism according to an embodiment of the present invention.
Description of reference numerals:
1-generator, 2-condenser, 3-evaporator, 4-circulating water system, 5-absorber, 6-heat exchanger, 7-conveying pipeline, 8-recovery pipeline, 9-first pipeline, 10-cooler, 11-second pipeline, 12-conveying pump, 13-first opening, 14-second opening and 15-third opening.
Detailed Description
In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail with reference to the accompanying drawings in conjunction with embodiments.
With reference to fig. 1, according to an aspect of the present invention, there is provided a refrigeration system including:
the generator 1 is internally provided with a refrigerant water solution, and the generator 1 is arranged to be capable of introducing steam so as to evaporate water in the refrigerant water solution to form water vapor;
a condenser 2, wherein the condenser 2 is used for condensing the water vapor discharged by the generator 1 into water; and
the evaporator 3 is arranged to evaporate the water condensed in the condenser 2 to form water vapor, and the evaporator 3 is arranged to be capable of exchanging heat with a circulating water system 4.
The utility model discloses an among the refrigerating system through letting in hot steam to generator 1, pass through condenser 2 and evaporimeter 3 in proper order again after making the water evaporation in the refrigerant aqueous solution form vapor, specifically speaking, vapor is through condenser 2 condensation water, pass through evaporimeter 3 back again, finally form cold vapor and cool down with the water through the heat exchange to among the circulating water system 4, in the heat exchange process, the effect of cooling is realized with the circulating water pipe outside to the circulating water in circulating water system 4 to the circulating water to the vapor after the cooling.
It should be noted that, in order to give comprehensive consideration to the emission problem of low pressure steam, avoid directly discharging and cause a large amount of heat energy extravagant, the utility model discloses an it is low pressure steam to let in steam in the generator, utilizes low pressure steam to prepare cold volume for the circulating water cooling, with on-the-spot unloading low pressure steam recycle, has solved the problem that the energy is extravagant that often appears in chemical enterprises will be rich in the surplus low-grade steam on-the-spot unloading. While the vapour condensate in the generator 1 can also be recovered.
Because the temperature of the circulating water after heat exchange through the evaporator 3 in the refrigeration process is lower, the circulating water circulation quantity of a circulating water system can be reduced, and the consumption of the circulating water can be effectively reduced, so that low-grade hot steam in a chemical system can be recovered, steam condensate can be recovered, the consumption of desalted water can be reduced, the temperature of the circulating water in public works can be reduced, the purposes of reducing the consumption of the circulating water and the circulating water circulation quantity are achieved, and the problem of load reduction of the summer system due to insufficient circulating water quantity is solved. It is worth noting that since the steam is generated from desalinated water, the use of partially desalinated water can be reduced by using low-pressure steam that is vented and performing recovery of the steam condensate.
In addition, under the premise of a constant load of a process unit, the surplus of a low-grade heat source (low-pressure steam) is periodic, and the surplus of the low-pressure steam is large in summer due to high ambient temperature, low heat tracing demand of a system and the like, namely, the on-site emptying amount of the low-pressure steam is large. In winter, the surplus of low-pressure steam is relatively small and the on-site emptying amount of the low-pressure steam is small due to low environmental temperature, large heat accompanying quantity of a system and a heating period. In summer, the circulating water temperature is high due to high environmental temperature, and the circulating water quantity required by the system is large; in winter, the environmental temperature is low, the circulating water temperature is low, and the circulating water quantity required by the system is small. Therefore, the low-pressure steam refrigeration is used for cooling the circulating water, the complementary effect is just achieved, the low-pressure steam quantity is matched with the circulating water temperature, the energy is fully utilized, and the purpose of cooling is achieved.
In order to achieve the recycling of the aqueous refrigerant solution, the refrigeration system comprises a recovery unit comprising:
an absorber 5, said absorber 5 being arranged for receiving water vapour generated in said evaporator 3; and
a heat exchanger 6, wherein a conveying pipeline 7 is arranged between the heat exchanger 6 and the generator 1, so that the refrigerant concentrated solution formed after the refrigerant aqueous solution is evaporated is conveyed to the heat exchanger 6 through the conveying pipeline 7, and the heat exchanger 6 is connected with the absorber 5 so as to exchange heat between the refrigerant concentrated solution and the refrigerant dilute solution formed in the absorber.
The refrigerant water solution in the generator 1 is a dilute solution, after low-pressure steam is introduced into the generator 1, water in the refrigerant water solution is evaporated and then changed into a refrigerant concentrated solution, the refrigerant concentrated solution enters the heat exchanger 6, and in the absorber 5, the refrigerant concentrated solution absorbs water vapor generated by the evaporator 3, so that the generation of the water vapor in the evaporator 3 is facilitated, and the evaporation refrigeration effect in the evaporator 3 is promoted. In addition, after the energy heat exchange between the concentrated solution in the heat exchanger 6 and the dilute solution formed in the absorber 5 is recovered, the dilute solution is sent to the generator 1 for reuse.
It will be appreciated that for this purpose a recovery conduit 8 is provided between the heat exchanger 6 and the generator 1 for feeding the dilute refrigerant solution to the generator 1, whereby the dilute solution will be fed to the generator 1 via the recovery conduit 8.
A first pipeline 9 for conveying the refrigerant concentrated solution to the absorber 5 is connected between the heat exchanger 6 and the absorber 5, and a cooler 10 is arranged on the first pipeline 9. The concentrated refrigerant solution is cooled by the cooler 10 and is conveyed into the absorber 5 through the first pipeline 9, the concentrated solution and the water vapor in the absorber 5 are mixed to form a dilute solution, the water vapor is absorbed by the concentrated solution in the absorber 5, the evaporation in the evaporator 3 can be promoted, and the temperature in the absorber 5 is low due to the action of the cooler 10, so that the purpose of further promoting the evaporation in the evaporator 3 is achieved, and the evaporation rate is increased.
In order to convey the dilute solution in the absorber 5 to the heat exchanger 6, a second pipeline 11 for conveying the refrigerant dilute solution to the heat exchanger 6 is connected between the absorber 5 and the heat exchanger 6. Further, a delivery pump 12 is disposed on the second pipeline 11. Because the dilute solution in the absorber 5 has a lower temperature, and the concentrated solution in the heat exchanger 6 has a higher temperature, the dilute solution and the concentrated solution can complete heat exchange in the heat exchanger 6, so that the dilute solution reaches a preset temperature and is recovered into the generator 1, and the concentrated solution is further cooled through the subsequent cooler 10 after being cooled by the dilute solution, thereby achieving the purpose of reducing the working energy consumption of the cooler 10.
It can be seen that the utility model discloses refrigerating system refrigeration process includes: occurrence → condensation → evaporation → absorption → occurrence. In the present embodiment, the refrigerant is generally selected from the group consisting of lithium bromide-water, ammonia-water, and the like, which have a low boiling point and are easy to evaporate and have good fluidity.
In the present embodiment, the absorber 5 is provided with a first opening 13, a second opening 14, and a third opening 15, the first opening 13 is connected to the first pipe 9, the second opening 14 is connected to the second pipe 11, and the third opening 15 is connected to the evaporator 3. It should be noted that a throttle valve is disposed on the first pipeline 9 to control the flow rate of the concentrated solution cooled by the cooler 10.
It is noted that for the purpose of saving energy consumption, the condenser 2 is configured to be driven by the low-pressure steam, and the driven low-pressure steam can be recycled into the generator 1 for refrigeration. Further, the cooler 10 and the transfer pump 12, etc. in the refrigeration system may be driven by low-pressure steam.
For example, the on-site emptying amount of 1.1MPa steam per hour is about 150t when a 180-kiloton/a coal-based methanol production system runs at full load in summer, so that a large amount of steam, desalted water and heat are wasted, and if the redundant 1.1MPa steam can be recycled, the production cost of enterprises can be saved, and the national policy of energy conservation and emission reduction is met.
The refrigerating process is a single-effect process, and more refrigerating capacity can be provided if a series double-effect lithium bromide refrigerating process or other high-efficiency refrigerating processes are adopted. In order to enable the system to output more cold energy, equipment needing cooling in the system preferentially uses the air cooling system for cooling, and meanwhile, in order to save power consumption, the air cooling system can be driven by low-grade steam, and the driven steam enters the refrigerating system again to prepare the cold energy.
The utility model discloses the second aspect provides a circulating water cooling mechanism, including circulating water system 4 and above-mentioned arbitrary scheme refrigerating system, evaporimeter 3 with circulating water system 4 can carry out the heat exchange.
The utility model discloses a circulating water cooling body can combine together low pressure steam and circulating water system 4 to utilize low pressure steam refrigeration, the cold volume of preparing and circulating water system 4 couplings effectively reduce the circulating water temperature, reduce circulating water consumption, can retrieve steam condensate simultaneously, reduce the consumption of demineralized water. Furthermore, the cold energy produced by the refrigerating system can be sent to the water supply of the circulating water, the return water of the circulating water, the circulating water pool or the circulating water cooling water tower, and can be introduced into the evaporator 3 by the circulating water for heat exchange to extract the cold energy, thereby achieving the purpose of reducing the temperature of the circulating water.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A refrigeration system, comprising:
the water-cooled generator comprises a generator (1), wherein a refrigerant water solution is filled in the generator (1), and the generator (1) is provided with a structure capable of introducing steam to evaporate water in the refrigerant water solution to form water vapor;
a condenser (2), the condenser (2) being arranged for condensing water vapour discharged by the generator (1) into water; and
the evaporator (3), the evaporator (3) sets up to be used for with the water after the condensation in condenser (2) evaporates and forms vapor, evaporator (3) sets up to be able to carry out the heat exchange with circulating water system (4).
2. The refrigeration system of claim 1, comprising a recovery unit, the recovery unit comprising:
an absorber (5), the absorber (5) being arranged for receiving water vapour generated within the evaporator (3); and
a delivery pipeline (7) is arranged between the heat exchanger (6) and the generator (1) so as to deliver the refrigerant concentrated solution formed after the refrigerant aqueous solution is evaporated to the heat exchanger (6) through the delivery pipeline (7), and the heat exchanger (6) is connected with the absorber (5) so as to enable the refrigerant concentrated solution to exchange heat with the refrigerant dilute solution formed in the absorber (5).
3. A refrigeration system according to claim 2, characterized in that a recovery conduit (8) is provided between the heat exchanger (6) and the generator (1) for conveying the refrigerant weak solution to the generator (1).
4. A refrigeration system according to claim 2, characterized in that a first line (9) for conveying the concentrated refrigerant solution to the absorber (5) is connected between the heat exchanger (6) and the absorber (5), and a cooler (10) is arranged on the first line (9).
5. A refrigeration system according to claim 4, characterized in that a second line (11) for conveying the refrigerant weak solution to the heat exchanger (6) is connected between the absorber (5) and the heat exchanger (6).
6. A refrigeration system as claimed in claim 5, characterized in that a feed pump (12) is provided on the second line (11).
7. A refrigeration system according to claim 5, characterized in that said absorber (5) is provided with a first opening (13), a second opening (14) and a third opening (15), said first opening (13) being connected to said first line (9), said second opening (14) being connected to said second line (11), said third opening (15) being connected to said evaporator (3).
8. Refrigeration system according to any of claims 1 to 7, characterized in that the steam introduced into the generator (1) is low-pressure steam.
9. A refrigeration system according to claim 8, characterized in that the condenser (2) is arranged to be drivable by the low-pressure steam.
10. A circulating water cooling mechanism comprising a circulating water system (4) and the refrigeration system according to any one of claims 1 to 9, wherein the evaporator (3) is capable of heat exchange with the circulating water system (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021331358.XU CN212778148U (en) | 2020-07-08 | 2020-07-08 | Refrigerating system and circulating water cooling mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021331358.XU CN212778148U (en) | 2020-07-08 | 2020-07-08 | Refrigerating system and circulating water cooling mechanism |
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| Publication Number | Publication Date |
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| CN212778148U true CN212778148U (en) | 2021-03-23 |
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| CN202021331358.XU Active CN212778148U (en) | 2020-07-08 | 2020-07-08 | Refrigerating system and circulating water cooling mechanism |
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