CN108795391A - A kind of cold storage refrigerating system refrigerating medium - Google Patents
A kind of cold storage refrigerating system refrigerating medium Download PDFInfo
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- CN108795391A CN108795391A CN201810560445.3A CN201810560445A CN108795391A CN 108795391 A CN108795391 A CN 108795391A CN 201810560445 A CN201810560445 A CN 201810560445A CN 108795391 A CN108795391 A CN 108795391A
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- refrigerating medium
- refrigerating
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- potassium formate
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
- C09K5/10—Liquid materials
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Abstract
The invention discloses a kind of cold storage refrigerating system refrigerating medium, the group of the refrigerating medium be divided into the potassium formate of mass ratio 30%~45%, 15%~27% pentaerythrite, 10%~18% Water Dispersible Polyisocyanates, 0~3% propylene glycol, 0~2% dehydroactic acid sodium, 0~2% potassium sorbate and 15%~25% distilled water or deionized water.
Description
Technical field
The present invention relates to low-temperature refrigeration technology field more particularly to a kind of cold storage refrigerating system refrigerating mediums.
Background technology
Food security and cold chain construction enter high-speed development period, the backbone ring that freezer circulates as food low-temperature at present
Section, is crucial the links of entire cold chain.Liquefied ammonia and fluorine profit are mainly used in the prior art for large cold storage
It is high to freeze as refrigerant.
Liquefied ammonia refrigeration system is generally by refrigeration unit, ammonia oil separator, high-pressure reservoir, condenser, low pressure recycle liquid storage
The compositions such as bucket, oil catcher, ammonia pump and air-cooler, although liquefied ammonia refrigerating efficiency is higher, and operation cost is relatively low, this system pipes
Road is complicated, and operational administrative difficulty is big, very high to the professional standards requirement of operating personnel, simultaneously because being difficult to realize automation, is
System needs 24 hours operational administratives on duty of operating personnel.And there are oil returns in direct evaporation system, and difficult, liquefied ammonia is easy leakage
The problem of, once leaking, which occurs, in ammonia easily there is explosion accident.Fluorine refrigeration system is high in first stage of construction input cost, and same
As direct evaporation system, need mixed base grease in freon, when refrigeration system outdoor unit connecting copper pipe vertical height or
When total length increases, the serious oil return of refrigeration system can be caused unsmooth, so as to cause being greatly reduced for refrigerating efficiency, also resulted in
Power consumption is sharply increased.Also, freon refrigerant freezes when leaking without obvious characteristic, therefore in mending-leakage and filling
Operation cost can be greatly improved in agent.In the prior art the existing mode using indirect refrigeration to above-mentioned liquefied ammonia or freon as
Refrigerant carries out the replacement of direc expansion refrigeration.
Used refrigerating medium is generally water, brine, ethylene glycol, propylene glycol, dichloromethane or three chloroethenes in the prior art
Alkene.There is a problem of that cryogenic temperature is low or above-mentioned several substances make refrigerating medium as main component or exist to pipeline corruption
The larger problem of corrosion.It can be seen that being badly in need of a kind of low temperature refrigerating that can be suitable for indirect refrigeration system in this field at present
Agent.
Invention content
The first technical problem to be solved by the present invention is to provide a kind of refrigerating medium suitable for indirect refrigeration system, to carry
The cold-storage ability of high freezer refrigerating, the refrigerating medium have the characteristics that low-corrosiveness and low cryogenic temperature.
In order to solve the above technical problem, the present invention provides a kind of cold storage refrigerating system refrigerating medium, the refrigerating mediums
Group be divided into the potassium formate of mass ratio 30%~45%, 15%~27% pentaerythrite, 10%~18% it is water dispersible more
Isocyanates, 0~3% propylene glycol, 0~2% dehydroactic acid sodium, 0~2% potassium sorbate and 15%~25% distilled water or
Deionized water.
In one embodiment, when the operating temperature of refrigerating medium is at 0 DEG C~-15 DEG C, potassium formate in the refrigerating medium
Mass ratio is 30%~35%.
In one embodiment, when the operating temperature of refrigerating medium is at -15 DEG C~-35 DEG C, potassium formate in the refrigerating medium
Mass ratio be 35%~40%.
In one embodiment, when the operating temperature of refrigerating medium is at -35 DEG C~-50 DEG C, potassium formate in the refrigerating medium
Mass ratio be 40%~45%.
<Indirect refrigeration system>
Fig. 1 is the refrigerant system configurations schematic diagram of the present invention.The cold storage refrigerating system of the present invention includes the first refrigeration cycle
System and the second cooling cycle system, first cooling cycle system include main refrigeration unit 1, evaporative condenser 2 and main system
Cold group heat exchanger 3, second cooling cycle system include heat exchanger between water storage pool 5, regulation station 6, refrigerating water pump 7 and freezer
8.It is the refrigerating medium filled with the present invention in refrigeration cycle second.
<Refrigerating medium component>
Cold liquid is potassium formate-pentaerythrite-Water Dispersible Polyisocyanates-in used in the water storage pool of the present invention
Water system refrigerating medium, in this concrete component of cold liquid be mass ratio 30%~45% potassium formate, 15%~27% pentaerythrite,
10%~18% Water Dispersible Polyisocyanates, 0~3% propylene glycol, 0~2% dehydroactic acid sodium, 0~2% potassium sorbate
Distilled water or deionized water with 15%~25% are constituted.Density of cold liquid is in 1.04~1.36g/cm in this3, specific heat is 0.56
~0.746cal/g DEG C, viscosity is more than in 2.9~15.9mPas (cp), thermal conductivity in 0.21~0.47W/m.K, boiling point
150 DEG C, freezing point is less than -60 DEG C, no flash-point.
The freezing point of the refrigerating medium of the present invention depends primarily on the content of potassium formate and propylene glycol, when the content of potassium formate is higher
When, the freezing point of refrigerating medium can be lower.
<The preparation of refrigerating medium>
The refrigerating medium of the present invention in the preparation mixes material using closed reaction kettle, first to closed reaction
Water, pentaerythrite, propylene glycol, dehydroactic acid sodium and potassium sorbate are added in kettle, addition can water to after being completely dissolved by stirring
Dispersible polyisocyanate continues stirring to being completely dissolved.It is eventually adding potassium formate, and is stirred, until being completely dissolved.
It is filtered after solution left standstill, is stored using sealing container after filtering.
The present invention used closed reaction kettle when preparing refrigerating medium is the closed reaction of 10000L volumes or more
Kettle, reactor tank body design pressure are higher than 1.0Mpa, and sandwich design pressure is higher than 0.6Mpa.
Compared with prior art, one or more embodiments of the invention can have the following advantages that：
1. the refrigerating medium cold-storage ability of the present invention is strong, it is suitable for cryogenic refrigeration.
2. the refrigerating medium of the present invention is non-corrosive, no flash-point, no explosion limit is suitable for what freezer refrigerating low cost used
Demand.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that understand through the implementation of the invention.The purpose of the present invention and other advantages can be by specification, rights
Specifically noted structure is realized and is obtained in claim and attached drawing.
Description of the drawings
Attached drawing is used to provide further understanding of the present invention, and a part for constitution instruction, the reality with the present invention
It applies example and is used together to explain the present invention, be not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the system structure diagram according to inventive refrigeration system；
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made below in conjunction with attached drawing further
Ground is described in detail.
Embodiment 1
In the present embodiment, in refrigerating medium the mass ratio of each component be potassium formate 38%, it is pentaerythrite 21%, water dispersible more
Isocyanates 16.9%, propylene glycol 1.55%, dehydroactic acid sodium 1.45%, potassium sorbate 1.1% and distilled water 20%.
When preparation, by 20Kg distilled water, 21Kg pentaerythrites, 1.55Kg propylene glycol, the mountains 1.45Kg dehydroactic acid sodium 1.1Kg
Potassium sorbate is put into closed reaction kettle, and to being completely dissolved, Water Dispersible Polyisocyanates are then added in 2 hours of stirring
Temperature of reaction kettle is increased to 20 DEG C~35 DEG C by 16.9Kg, and 3 hours of stirring are to being completely dissolved.Divide two batches that first is added again
Sour potassium 38Kg, is added 19Kg every time, is stirred 2.5 hours after potassium formate is added every time.It finally will be right after solution left standstill 4 hours
Solution is filtered.
Refrigerating medium density prepared by the present embodiment is in 1.105g/cm3, at 0.589cal/g DEG C, viscosity exists specific heat
12.5mPas (cp), thermal conductivity is in 0.26W/m.K, and boiling point is more than 150 DEG C, and freezing point is less than -60 DEG C.
Embodiment 2
In the present embodiment, in refrigerating medium the mass ratio of each component be potassium formate 45%, it is pentaerythrite 18%, water dispersible more
Isocyanates 12.9%, propylene glycol 1.55%, dehydroactic acid sodium 1.45%, potassium sorbate 1.1% and distilled water 20%.
When preparation, by 20Kg distilled water, 18Kg pentaerythrites, 1.55Kg propylene glycol, the mountains 1.45Kg dehydroactic acid sodium 1.1Kg
Potassium sorbate is put into closed reaction kettle, and to being completely dissolved, Water Dispersible Polyisocyanates are then added in 2 hours of stirring
12.9Kg, temperature of reaction kettle are 10 DEG C~15 DEG C, and 3 hours of stirring are to being completely dissolved.Divide three batches that potassium formate is added again
15Kg is added in 45Kg every time, is stirred 2 hours after potassium formate is added every time.Finally by after solution left standstill 4 hours to solution into
Row filtering.
Refrigerating medium density prepared by the present embodiment is in 1.358g/cm3, at 0.622cal/g DEG C, viscosity exists specific heat
2.9mPas (cp), thermal conductivity is in 0.47W/m.K, and boiling point is more than 150 DEG C, and freezing point is less than -60 DEG C.
Embodiment 3
In the present embodiment, in refrigerating medium the mass ratio of each component be potassium formate 32%, it is pentaerythrite 24%, water dispersible more
Isocyanates 18.9%, propylene glycol 2.55%, dehydroactic acid sodium 1.45%, potassium sorbate 1.1% and distilled water 20%.
When preparation, by 20Kg distilled water, 24Kg pentaerythrites, 2.55Kg propylene glycol, the mountains 1.45Kg dehydroactic acid sodium 1.1Kg
Potassium sorbate is put into closed reaction kettle, and to being completely dissolved, Water Dispersible Polyisocyanates are then added in 2 hours of stirring
18.9Kg, temperature of reaction kettle are 10 DEG C~15 DEG C, and 3 hours of stirring are to being completely dissolved.Divide two batches that potassium formate is added again
16Kg is added in 32Kg every time, is stirred 2 hours after potassium formate is added every time.Finally by after solution left standstill 4 hours to solution into
Row filtering.
Refrigerating medium density prepared by the present embodiment is in 1.04g/cm3, at 0.56cal/g DEG C, viscosity exists specific heat
15.9mPas (cp), thermal conductivity is in 0.21W/m.K, and boiling point is more than 150 DEG C, and freezing point is less than -60 DEG C.
The above, only specific implementation case of the invention, scope of protection of the present invention is not limited thereto, any ripe
Those skilled in the art are known in technical specification of the present invention, modifications of the present invention or replacement all should be in the present invention
Protection domain within.
Claims (4)
1. a kind of cold storage refrigerating system refrigerating medium, which is characterized in that the group of the refrigerating medium is divided into mass ratio 30%~45%
Potassium formate, 15%~27% pentaerythrite, 10%~18% Water Dispersible Polyisocyanates, 0~3% propylene glycol, 0
~2% dehydroactic acid sodium, 0~2% potassium sorbate and 15%~25% distilled water or deionized water.
2. refrigerating medium as described in claim 1, which is characterized in that when the operating temperature of refrigerating medium is at 0 DEG C~-15 DEG C, institute
The mass ratio for stating potassium formate in refrigerating medium is 30%~35%.
3. refrigerating medium as described in claim 1, which is characterized in that when the operating temperature of refrigerating medium is at -15 DEG C~-35 DEG C,
The mass ratio of potassium formate is 35%~40% in the refrigerating medium.
4. refrigerating medium as described in claim 1, which is characterized in that when the operating temperature of refrigerating medium is at -35 DEG C~-50 DEG C,
The mass ratio of potassium formate is 40%~45% in the refrigerating medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810560445.3A CN108795391B (en) | 2018-06-04 | 2018-06-04 | Secondary refrigerant for refrigeration house refrigerating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810560445.3A CN108795391B (en) | 2018-06-04 | 2018-06-04 | Secondary refrigerant for refrigeration house refrigerating system |
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| Publication Number | Publication Date |
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| CN108795391A true CN108795391A (en) | 2018-11-13 |
| CN108795391B CN108795391B (en) | 2020-07-28 |
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| CN201810560445.3A Active CN108795391B (en) | 2018-06-04 | 2018-06-04 | Secondary refrigerant for refrigeration house refrigerating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110669480A (en) * | 2019-10-22 | 2020-01-10 | 辛健 | Efficient composite secondary refrigerant and preparation method and application thereof |
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| CN108795391B (en) | 2020-07-28 |
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