CN108050718A - A kind of freezing engineering recycling waste heat recovery system and method - Google Patents
A kind of freezing engineering recycling waste heat recovery system and method Download PDFInfo
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- CN108050718A CN108050718A CN201711292840.XA CN201711292840A CN108050718A CN 108050718 A CN108050718 A CN 108050718A CN 201711292840 A CN201711292840 A CN 201711292840A CN 108050718 A CN108050718 A CN 108050718A
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- waste heat
- ammonia
- heat recovery
- freezing engineering
- freezing
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B40/00—Subcoolers, desuperheaters or superheaters
- F25B40/06—Superheaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
- F28D7/1615—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits being inside a casing and extending at an angle to the longitudinal axis of the casing; the conduits crossing the conduit for the other heat exchange medium
- F28D7/1623—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits being inside a casing and extending at an angle to the longitudinal axis of the casing; the conduits crossing the conduit for the other heat exchange medium with particular pattern of flow of the heat exchange media, e.g. change of flow direction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of freezing engineering recycling waste heat recovery system and methods; the system includes compression refigerating machine, evaporative condenser, ammonia storage tank, evaporating dish, Siphon pot, pressure reducing valve, flow valve; the system is additionally provided with waste heat recoverer; for recycling the heat in the high pressure superheater ammonia steam from compression refigerating machine; it exchanges heat with hot salt brine to be added, heating water and well-wall protection water is provided for freezing engineering scene.The present invention increases Waste Heat Recovery Xun Huan in traditional three systemic circulation of freezing engineering.In the case where not influencing refrigerating efficiency, to greatest extent using the waste heat in freezing engineering, the load of refrigerant system condenser can be mitigated, refrigerant system efficiency is improved, so as to reach energy saving and environmentally friendly double effects.
Description
Technical field
The present invention relates to a kind of freezing engineering recycling waste heat recovery system and methods.
Background technology
The essence of construction freezing method is using artificial Refrigeration Technique, and the heat exchange in stratum is out discharged into air
In, make the water freezing in stratum, increase its strength and stability.Conventional manual's construction freezing method includes three systemic circulations at present：Salt
Water Xun Huan, ammonia Xun Huan, cooling water circulation.At present, the amount of heat that engineering with artificial freezing method construction generates in the earth formation is exhausted directly to greatly
In gas, and the recycling of the exhaust gas heat in compression refigerating machine is ignored, cause ground heat waster.Such as given up using freezing engineering
Heat recovery system, the waste heat generated in recyclable process of refrigerastion, molded well-wall protection, pit shaft ventilation for accident pit shaft,
Antifreeze living area heating etc., will reduce the investment of the equipment such as coal-burning boiler, save coal-fired expense, save mass energy.In addition,
Using heat regenerator by after the processing of refrigeration system heat collection, system discharge pressure can be effectively reduced, mitigates refrigeration system condensation
The load of device improves refrigerant system efficiency, so as to reach energy saving and environmentally friendly double effects.Therefore, it is necessary to design one kind to freeze
Engineering recycling waste heat recovery system and method.
The content of the invention
In order to solve the technical issues of above-mentioned, the present invention provides a kind of freezing engineering recycling waste heat recovery system, including
Compression refigerating machine, evaporative condenser, ammonia storage tank, evaporating dish, Siphon pot, pressure reducing valve, flow valve, wherein, in compression refigerating machine
It is provided with exhaust main between evaporative condenser, exhaust main is by flow valve by height of the part from compression refigerating machine
Press through hot ammonia steam and waste heat recoverer be transported to by the air inlet of waste heat recoverer, for from the water inlet in waste heat recoverer
The hot salt brine to be added heat exchange that mouth flows into；Exhaust main is by flow valve by high pressure superheater ammonia of the another part from compression refigerating machine
Steam is transported to evaporative condenser and directly condenses；The lower drain of waste heat recoverer and Siphon pot unicom, for recycling height
Press gas-liquid mixed ammonia；The top floss hole of waste heat recoverer and exhaust main unicom, for major part to be overheated ammonia steam through row
Gas manifold is transported to evaporative condenser；Liquid ammonia from Siphon pot and evaporative condenser enters storage ammonia through pressure reducing valve respectively
Tank, then be transported in evaporating dish, it is cooled down for the brine to freezing engineering, compression refigerating machine is used to absorb heat in evaporating dish
High-temperature gas ammonia pressurized delivered afterwards carries out refrigeration again and Waste Heat Recovery Xun Huan to exhaust main.
The present invention provides a kind of freezing engineering recycling waste heat recovery methods, include the following steps：
(1) by the control and regulation of the flow valve in exhaust main by a part of high pressure superheater ammonia from compression refigerating machine
Steam is transported in waste heat recoverer, and it is cold that another part high pressure superheater ammonia steam from compression refigerating machine is transported to vaporation-type
Condenser；
(2) it is to be heated in waste heat recoverer with entering through water inlet into the high pressure superheater ammonia steam in waste heat recoverer
Brine exchanges heat, and forms a part of Ammonia steam and a part of high-pressure gas-liquid mixing ammonia；
(3) top floss hole of the Ammonia steam in step 2 through waste heat recoverer returns to exhaust main, and enters evaporation
Formula condenser, further to condense；
(4) lower drain through waste heat recoverer enters siphon to step 2 mesohigh gas-liquid mixed ammonia under the effect of gravity
Tank carries out gas-liquid separation；
(5) hot salt brine heated in waste heat recoverer after heat exchange is discharged through water outlet, is pumped up into water storage
Pond, for the heating water and well-wall protection water at freezing engineering scene.
Preferably, the waste heat recoverer is fixed heat-exchangers of the plate type.
Preferably, the temperature of the Ammonia steam in step 2 is 50~60 DEG C.
Preferably, the temperature of step 2 mesohigh gas-liquid mixed ammonia is 25~50 DEG C.
Preferably, the hot salt brine to be added in step 2 is 5~10 DEG C.
Preferably, the hot salt brine temperature heated in step 4 is 19~25 DEG C.
The present invention increases Waste Heat Recovery Xun Huan in traditional three systemic circulation of freezing engineering.It can not influence refrigeration effect
In the case of rate, to greatest extent using the waste heat in freezing engineering, mitigate the load of refrigerant system condenser, improve refrigeration system
System efficiency, so as to reach energy saving and environmentally friendly double effects.
Description of the drawings
The specific embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.
Fig. 1 is the schematic diagram of the freezing engineering recycling waste heat recovery system of one embodiment of the present of invention.
Fig. 2 is that the freezing engineering of one embodiment of the present of invention fixes the structure chart of heat-exchangers of the plate type.
Specific embodiment
As shown in Figure 1, according to one embodiment of present invention, freezing engineering recycling waste heat recovery system includes compression and freezes
Machine 1, waste heat recoverer 2, exhaust main 3, evaporative condenser 4, ammonia storage tank 5, evaporating dish 6, Siphon pot 7, pressure reducing valve 8, flow
Valve 9；Wherein, the compression refigerating machine 1 for freezing engineering uses liquid ammonia as refrigerant, the liquid ammonia suction in evaporating dish
Freezing engineering is received with being evaporated after the heat in brine, about 70-80 DEG C of high pressure superheater is formed after being compressed using compression refigerating machine
Ammonia steam, entrance F and exhaust main 3 unicom of the high pressure superheater ammonia steam discharged from compression refigerating machine through exhaust main 3, is being arranged
Under the adjustment effect of flow valve in gas manifold 3, wherein about 80% air inlet of the high pressure superheater ammonia steam through waste heat recoverer 2
A enters in waste heat recoverer 2, and about 20% high pressure superheater ammonia steam enters evaporative condenser by the outlet G of exhaust main 3
It transfers heat to cooling water in 4 to be condensed, the high-pressure liquid ammonia formed after condensation is returned through pressure reducing valve 8, then through ammonia storage tank 5
Evaporating dish 6 cools down freezing engineering with brine by evaporation endothermic, and compressed refrigeration machine 1 carries out the gaseous ammonia of generation again
Next refrigeration and Waste Heat Recovery Xun Huan.Respectively enter the ratio of the high pressure superheater ammonia steam of waste heat recoverer 2 and evaporative condenser 4
Example can be controlled to adjust by flow valve 9.
According to one embodiment of present invention, waste heat recoverer 2 is fixed heat-exchangers of the plate type, and concrete structure refers to
Fig. 2, including end socket 21, flange 22, tube sheet 23, pull rod and distance sink tube 24, heat exchanger tube 25, baffle plate 26, bearing 27, air inlet
A, lower drain B, top floss hole E, water outlet C, water inlet D.Wherein, hot salt brine to be added flows into waste heat through water inlet D and returns
Device 2 is received, heat exchange is carried out with entering the high pressure superheater ammonia steam of waste heat recoverer 2 by air inlet A through heat exchanger tube 25.It is handed over through heat
After changing, most of ammonia steam (about 90~95%) temperature that overheats is about 50~60 DEG C, and has sub-fraction (about 5~10%) overheat
Ammonia steam is condensed into the high-pressure gas-liquid mixing ammonia that temperature is 25~50 DEG C by heat exchange, which is 25~50 DEG C of height
Pressure gas-liquid mixed ammonia is subject to gravity, enters Siphon pot 7 through lower drain E, realizes gas-liquid separation and gaseous state to liquid
The transformation of state, the liquid ammonia of formation enter evaporating dish 6 to freezing engineering brine using after the decompression of pressure reducing valve 9 through ammonia storage tank 5
Freeze, the Ammonia steam of generation enters back into the pressurization of compression refigerating machine 1 and carries out next refrigeration and Waste Heat Recovery Xun Huan.
The Ammonia steam that most of temperature is about 50~60 DEG C is discharged by the top floss hole B of waste heat recoverer 2
Then exhaust main 3 flows into evaporative condenser 4 by the outlet G of exhaust main 3, is further condensed.
Hot salt brine to be added is 19~25 DEG C with after high pressure superheater ammonia steam heat-exchanging, forming temperature in waste heat recoverer 2
Hot salt brine, hot salt brine enter tank, heating water, the borehole wall for freezing engineering scene through water outlet C by pumping mode
Protection water.
Embodiment
(1) freezing engineering Waste Heat Recovery heat transfer area calculates
That the waste heat recoverer 2 in the present invention is selected is fixed heat-exchangers of the plate type (see Fig. 2), and tube side medium is to be added
Hot salt brine, shell side medium are the overheat ammonia steam that temperature is about 70~80 DEG C.
Physical property temperature variations：Overheat 70 DEG C of ammonia inlet steam temperature, 50 DEG C of outlet temperature；Brine inlet temperature to be heated
5 DEG C of degree, 20 DEG C of outlet temperature.
Qualitative temperature：For low viscosity fluids such as general gas flow and water, qualitative temperature can use fluid inlet and outlet temperature
Average value.
Therefore the qualitative temperature of shell-side fluid is：
The qualitative temperature of tube side fluid is：
1) heat flow
According to qualitative temperature, the related physical data for taking shell side and tube side fluid is looked into respectively, is brought data into formula 1, is asked
Heat flow Q1。
Q1=m1cp1Dt1 (1)
Wherein：ρ1--- ammonia is in 60 DEG C of lower densities, kg/m3；
cp1--- ammonia specific heat at constant pressure at 60 DEG C, kJ/kg DEG C；
Dt1--- ammonia imports and exports the temperature difference, DEG C.
2) mean temperature difference
Δt2--- the salt water entrance temperature difference, DEG C.
3) heat transfer area is estimated
K --- heat transfer coefficient, W/ (m2.K)。
(2) shell-and-tube heat exchanger specification type selecting
According to heat transfer area estimation result, with reference to fixed tube-sheet exchanger pattern and basic parameter (JB/T4715-92)
Selection criteria heat exchanger.The specification of heat exchanger tube includes caliber and pipe range, and heat exchanger tube diameter is smaller, the heat exchange of heat exchanger unit volume
Area is bigger.It therefore, can use for clean fluid caliber smaller, but for the fluid of unholiness or easy fouling, caliber should take
Obtain more greatly, in order to avoid block.Parameter gauge outfit such as table 1.
1 fixed tube-sheet exchanger parameter of table
(3) hot salt brine flow velocity to be added in pipe
First according to the flow q of hot salt brine to be added in heat flow computer tubem2
cp2--- brine specific heat at constant pressure at 17.5 DEG C, kJ/kg DEG C；
qm2--- the flow of hot salt brine to be added, kg/s.
The parameter tube side flow area A provided further according to standard heat exchanger1, seek hot salt brine flow velocity u to be added in pipei
ρ2--- brine is in 17.5 DEG C of lower densities, kg/m3
ui--- brine flow to be heated, m/s.
It is calculated according to the design of more than waste heat recoverer, can draw table 2.Result is brought into above formula, can be obtained following
Waste heat recoverer design load heat-recoverable under the state of operating at full capacity is 25.1505 ten thousand kilocalories/h, meets temperature control hole system
The demand of 22.985 ten thousand kilocalories of calorific requirement/h~23.23 ten thousand kilocalories/h.
2 result of calculation of table
It is calculated according to above design, the fixed plate that structure design and technology requirement, heat regenerator operational data are produced
Formula heat exchanger finished product is as shown in Figure 2.A tube side medium is designed as hot salt brine to be added, shell side medium is overheat ammonia steam
The horizontal fixed heat-exchangers of the plate type of tube side.Heat exchanger tube is 25 × 2 more advanced cold-drawn heat-transfer pipes of Φ.Heat exchange area 25.87m2, heat exchange
Length of tube 1000mm.Design pressure：Tube side 0.4MA, shell side 1.4MA.Temperature：70~80 DEG C of shell-side A imports, B outlets 50~60
DEG C, 10 DEG C of pipe side D imports, C exports 25 DEG C.
Above-described embodiment is illustrated merely for convenience of description, and the interest field that the present invention is advocated should be with claims
Subject to, not just the above examples.
Claims (10)
1. a kind of freezing engineering recycling waste heat recovery system, including compression refigerating machine, evaporative condenser, ammonia storage tank, evaporating dish,
Siphon pot, pressure reducing valve, flow valve, it is characterised in that：It is provided between the compression refigerating machine and the evaporative condenser
Exhaust main, the exhaust main are passed through high pressure superheater ammonia steam of the part from the compression refigerating machine by flow valve
The air inlet of the waste heat recoverer is transported to the waste heat recoverer, for being flowed into the water inlet from the waste heat recoverer
Hot salt brine to be added heat exchange；The exhaust main is by the flow valve by high pressure superheater of the another part from compression refigerating machine
Ammonia steam is transported to evaporative condenser and directly condenses；The lower drain of the waste heat recoverer and the Siphon pot unicom,
For recycling high-pressure gas-liquid mixing ammonia；The top floss hole of the waste heat recoverer and the exhaust main unicom are big for inciting somebody to action
Part overheat ammonia steam is transported to the evaporative condenser through the exhaust main；
Liquid ammonia from the Siphon pot and the evaporative condenser enters ammonia storage tank through pressure reducing valve respectively, then is transported to institute
It states in evaporating dish, is cooled down for the brine to freezing engineering；The compression refigerating machine is used to absorb heat in the evaporating dish
High-temperature gas ammonia pressurized delivered afterwards carries out refrigeration again and Waste Heat Recovery Xun Huan to the exhaust main.
2. freezing engineering recycling waste heat recovery system according to claim 1, it is characterised in that：The waste heat recoverer is
Fixed heat-exchangers of the plate type.
3. a kind of freezing engineering recycling waste heat recovery method, includes the following steps：
(1) by the control and regulation of the flow valve in exhaust main by a part of high pressure superheater ammonia steam from compression refigerating machine
It is transported in waste heat recoverer, another part high pressure superheater ammonia steam from compression refigerating machine is transported to evaporating type condensing
Device；
(2) it is to be heated in waste heat recoverer with entering through water inlet into the high pressure superheater ammonia steam in the waste heat recoverer
Brine exchanges heat, and forms a part of Ammonia steam and a part of high-pressure gas-liquid mixing ammonia；
(3) top floss hole of the Ammonia steam in step 2 through the waste heat recoverer returns to the exhaust main, and enters
Evaporative condenser, further to condense；
(4) step 2 mesohigh gas-liquid mixed ammonia is described in lower drain through the waste heat recoverer enters under the effect of gravity
Siphon pot carries out gas-liquid separation；
(5) hot salt brine heated in the waste heat recoverer after heat exchange is discharged through water outlet, then is pumped up into storage
Pond, for the heating water and well-wall protection water at freezing engineering scene.
4. freezing engineering recycling waste heat recovery method according to claim 3, it is characterised in that：The waste heat recoverer is
Fixed heat-exchangers of the plate type.
5. freezing engineering recycling waste heat recovery method according to claim 3, it is characterised in that：The Ammonia steam
Temperature is 50~60 DEG C.
6. freezing engineering recycling waste heat recovery method according to claim 3, it is characterised in that：The high-pressure gas-liquid mixing
The temperature of ammonia is 25~50 DEG C.
7. freezing engineering recycling waste heat recovery method according to claim 3, it is characterised in that：The hot salt brine to be added is
5~10 DEG C.
8. freezing engineering recycling waste heat recovery method according to claim 3, it is characterised in that：The hot salt heated
Coolant-temperature gage is 19~25 DEG C.
9. freezing engineering recycling waste heat recovery method according to claim 3, which is characterized in that further include following steps：
Liquid ammonia from the Siphon pot and the evaporative condenser enters ammonia storage tank through pressure reducing valve respectively, then is transported to evaporating dish
In, it is cooled down for the brine to freezing engineering.
10. freezing engineering recycling waste heat recovery method according to claim 9, which is characterized in that further include following steps：
The compression refigerating machine to the exhaust main, carries out the high-temperature gas ammonia pressurized delivered after absorbing heat in the evaporating dish another
Secondary refrigeration and Waste Heat Recovery Xun Huan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711292840.XA CN108050718B (en) | 2017-12-08 | 2017-12-08 | Waste heat recycling system and method for freezing engineering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711292840.XA CN108050718B (en) | 2017-12-08 | 2017-12-08 | Waste heat recycling system and method for freezing engineering |
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| Publication Number | Publication Date |
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| CN108050718A true CN108050718A (en) | 2018-05-18 |
| CN108050718B CN108050718B (en) | 2020-02-21 |
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ID=62123149
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711292840.XA Active CN108050718B (en) | 2017-12-08 | 2017-12-08 | Waste heat recycling system and method for freezing engineering |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109879251A (en) * | 2019-03-07 | 2019-06-14 | 南京工程学院 | A kind of hydrogen chloride synthesis system based on total energy approach |
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| JP2675620B2 (en) * | 1989-05-17 | 1997-11-12 | 株式会社ガスター | Heat pump type air conditioner |
| CN2634397Y (en) * | 2003-06-20 | 2004-08-18 | 徐生恒 | Multiple heat source air conditioning system |
| JP2009236403A (en) * | 2008-03-27 | 2009-10-15 | Denso Corp | Geothermal use heat pump device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109879251A (en) * | 2019-03-07 | 2019-06-14 | 南京工程学院 | A kind of hydrogen chloride synthesis system based on total energy approach |
| CN109879251B (en) * | 2019-03-07 | 2024-05-03 | 南京工程学院 | Hydrogen chloride synthesis system based on energy comprehensive utilization |
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| Publication number | Publication date |
|---|---|
| CN108050718B (en) | 2020-02-21 |
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