CN211177494U - Single-effect heating and double-effect refrigerating two-section type lithium bromide absorption heat pump unit - Google Patents
Single-effect heating and double-effect refrigerating two-section type lithium bromide absorption heat pump unit Download PDFInfo
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- CN211177494U CN211177494U CN201920915505.9U CN201920915505U CN211177494U CN 211177494 U CN211177494 U CN 211177494U CN 201920915505 U CN201920915505 U CN 201920915505U CN 211177494 U CN211177494 U CN 211177494U
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- 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
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- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
Abstract
The utility model relates to a single-effect heats economic benefits and social benefits refrigerated two-section type lithium bromide absorption heat pump unit belongs to refrigeration plant technical field. The unit comprises a steam generator I, a condenser I, an evaporator I, an absorber I, a heat exchanger I, a solution pump I, a refrigerant pump I, a steam generator II, a low-pressure generator, a condenser II, an evaporator II, an absorber II, a heat exchanger II, a solution pump II, a refrigerant pump II, a stop valve A and a stop valve B. The utility model discloses a two-stage lithium bromide absorption heat pump unit of single-effect heating double-effect refrigeration, which is switched by a valve, and when the heating working condition is operated in winter, the unit is operated according to the two-stage heat pump principle; when the refrigerating working condition is operated in summer, the unit operates according to the steam double-effect type solution parallel refrigerating flow. Meanwhile, the refrigeration performance coefficient of double-effect refrigeration is greatly improved, the steam consumption is saved, the machine has two functions, the initial investment of equipment is reduced, and the occupied space is saved.
Description
Technical Field
The utility model relates to a single-effect heats economic benefits and social benefits refrigerated two-section type lithium bromide absorption heat pump unit belongs to refrigeration plant technical field.
Background
In the production process and the life, in the area where a heat source is needed and low-temperature waste heat is available, under the condition that waste heat needs to be deeply recovered, the temperature of waste heat water is large and the temperature is low, the temperature of the prepared hot water is high and the temperature difference is large, a multi-section first-type lithium bromide absorption heat pump unit (for example, a two-section steam first-type lithium bromide absorption heat pump unit shown in fig. 1) is adopted, a large amount of (more than 40%) medium-pressure steam consumption can be saved, and the comprehensive utilization of energy is realized. In some occasions, heat supply is needed in winter, refrigeration is needed in summer, in order to realize two purposes of one machine and save initial investment, a steam type first-class lithium bromide absorption heat pump unit with a refrigeration function appears in two years (as shown in figure 2), the heating coefficient of the unit is about 1.7, and the refrigeration coefficient is about 0.75. Under the condition that the waste heat needs to be deeply recovered, the unit is not easy to realize by adopting the unit shown in the figure 2, the heat exchange temperature difference is small, the heat exchange area is large, the unit material cost is high, in order to meet the heating requirement, the heat pump unit needs to adopt a two-stage type, however, how to realize double-effect refrigeration on the two-stage type heat pump unit can improve the refrigeration performance coefficient, the steam is saved, no matter heat supply or refrigeration, the heat exchange area of the unit can be reduced, the unit material cost is reduced, the operation is simple, the safety and the reliability are realized, and the heat pump unit becomes one of important subjects researched.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the above-mentioned background problem, provide a two-period form lithium bromide absorption heat pump set of single-effect heating double-effect refrigeration, its heat pump degree of depth retrieves low temperature waste heat supply in winter, operation double-effect refrigeration in summer, improvement refrigeration coefficient of performance, the energy can be saved, a tractor serves two purposes, compact structure, easy operation, safe and reliable that reduce the initial investment.
The utility model discloses the purpose realizes like this: a single-effect heating and double-effect refrigerating two-section lithium bromide absorption type unit comprises a steam generator I, a condenser I, an evaporator I, an absorber I, a heat exchanger I, a solution pump I, a refrigerant pump I, a steam generator II, a condenser II, an evaporator II, an absorber II, a heat exchanger II, a solution pump II and a refrigerant pump II.
The generator condenser shell of the unit also comprises a cavity I and a cavity II;
the condenser I and the steam generator I are both arranged in the cavity I;
the steam generator II and the condenser II are both arranged in the cavity II;
a low-pressure generator is also arranged in the cavity II;
a refrigerant steam communicating pipe is arranged between the gas phase area of the steam generator I and the tube pass inlet of the low-pressure generator;
a low-pressure generator refrigerant water pipe is arranged between the tube pass outlet of the low-pressure generator and the inlet of the U-shaped tube I of the condenser I;
a stop valve B is arranged on a hot water pipeline from the condenser II to the condenser I;
and a cooling water outlet pipe is arranged on the hot water pipeline between the outlet condenser II and the stop valve B, and the stop valve A is arranged on the cooling water outlet pipe.
The low pressure generator is arranged above or below the steam generator II.
A steam electric regulating valve A is arranged on a second steam inlet pipeline of the cavity I;
and a steam electric regulating valve B is also arranged on the first steam inlet pipeline of the cavity II. Still be provided with U type pipe II between condenser II and the evaporimeter II, the cryogen steam that low pressure generator concentration weak solution produced gets into in condenser II condensation cryogen water of condensation and gets into in U type pipe II and then the flash in the evaporimeter II.
The utility model has the advantages that:
the heat pump heating working condition and the completely different thermal field and flow field of the refrigeration working condition can be safely and reliably operated on the same unit by a brand new flow and valve adjustment and switching, the purposes of deep recovery of waste heat and heat supply of the heat pump in winter and double-effect refrigeration of operation in summer are achieved, the water system is cooled or heated in sections, the concentration difference and the heat exchange temperature difference of a unit solution are increased, the heat exchange area of the unit is reduced, the material cost is reduced, the refrigeration performance coefficient is greatly improved due to double-effect refrigeration, a large amount of energy is saved, the unit is dual-purpose, the initial investment of equipment is reduced, and the occupied space of the equipment is saved. Therefore, the utility model discloses can energy saving and emission reduction realize energy comprehensive utilization during winter heat supply, summer can prepare the cold source again and satisfy air conditioner and production technology and use, improve the annual rate of utilization of operation of unit, have very good economic benefits and social.
Drawings
Fig. 1 is a flow chart of the operation of a conventional two-stage steam type first-type lithium bromide absorption heat pump unit.
Fig. 2 is a flow chart of the operation of a conventional steam type first-type lithium bromide absorption heat pump unit with a refrigeration function.
Fig. 3 is a flow chart of the work of the two-stage lithium bromide absorption unit of the single-effect heating and double-effect cooling of the present invention.
Fig. 4 is a flow chart of another embodiment of the present invention of a two-stage lithium bromide absorption unit with single-effect heating and double-effect cooling.
Wherein:
the system comprises a generator 1, a condenser 2, an evaporator 4, an absorber 5, a heat exchanger 3, a solution pump 6, a refrigerant pump 7, an electric steam regulating valve 8, a cooling water bypass valve 9 and a U-shaped pipe 10.
A steam electric control valve A11, a condenser I12, a steam generator I13, a steam generator II14, a condenser II15, a steam electric control valve B16, a heat exchanger II17, a concentrated solution valve B18, a U-shaped pipe II19, a refrigerant water valve B20, an absorber II21, an evaporator II22, a refrigerant pump II23, a solution pump II24, a solution pump I25, a refrigerant pump I26, an evaporator I27, an absorber I28, a U-shaped pipe I29, a refrigerant water valve A30, a heat exchanger I31, a concentrated solution valve A32, a stop valve A33, a stop valve B34, a refrigerant steam communicating pipe 35, a low-pressure generator 36, a low-pressure generator water pipe 37, a cavity I50 and a cavity II 51;
the heating water cooling system comprises a first steam inlet 38, a first condensed water outlet 39, a cold water outlet 40, a residual hot water outlet 41, a cold water inlet 42, a residual hot water inlet 43, a cooling water inlet 44, a heating hot water inlet 45, a heating hot water outlet 46, a cooling water outlet 47, a second steam inlet 48 and a second condensed water outlet 49.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
As shown in fig. 3, a single-effect heating and double-effect refrigerating two-stage lithium bromide absorption unit comprises a steam generator I13, a condenser I12, an evaporator I27, an absorber I28, a heat exchanger I31, a solution pump I25, a refrigerant pump I26, a steam generator II14, a condenser II15, an evaporator II22, an absorber II21, a heat exchanger II17, a solution pump II24 and a refrigerant pump II 23;
the generator condenser shell of the unit also comprises a cavity I50 and a cavity II 51;
the condenser I12 and the steam generator I13 are both arranged in the cavity I50;
the steam generator II14 and the condenser II15 are both arranged in the cavity II 51;
a low pressure generator 36 is also added in the cavity II51, and the low pressure generator 36 is arranged above the steam generator II 14;
a refrigerant steam communicating pipe 35 is arranged between the gas phase area of the steam generator I13 and the tube side inlet of the low-pressure generator 36;
a low-pressure generator refrigerant water pipe 37 is arranged between the outlet of the tube side of the low-pressure generator 36 and the inlet of a U-shaped pipe I29 of the condenser I12;
a stop valve B34 is arranged on a hot water pipe which is led out of the condenser II15 and led into the condenser I12;
a cooling water outlet pipe is arranged on the hot water pipeline between the outlet condenser II15 and the stop valve B34, and the stop valve A33 is arranged on the cooling water outlet pipe.
A steam electric regulating valve A11 is arranged on a pipeline of a second steam inlet 48 of the cavity I50;
and a steam electric regulating valve B16 is further arranged on a pipeline of the first steam inlet 38 of the cavity II 51.
And a U-shaped pipe II19 is also arranged between the condenser II15 and the evaporator II 22.
In this embodiment, the utility model relates to a two-stage lithium bromide absorption formula unit of single-effect heating double-effect refrigeration, its working method is as follows:
in winter, the low-pressure generator 36 stops working, the stop valve a33 is closed, the stop valve B34 is opened, the concentrated solution valve a32 and the concentrated solution valve B18 can adjust the flow rate of the corresponding concentrated solution, the refrigerant water valve a30 and the refrigerant water valve B20 can adjust the flow rate of the corresponding refrigerant and maintain the pressure difference between the cavities, and the unit operates according to the working principle of the two-stage lithium bromide absorption heat pump: the steam generator I13, the condenser I12, the evaporator I27, the absorber I28 and the heat exchanger I31 form a low temperature section heat pump cycle; the steam generator II14, condenser II15, evaporator II22, absorber II21, and heat exchanger II17 form a high temperature stage heat pump cycle. Since the coolant vapor temperature is low on the tube side of the low pressure generator 36, the solution is not concentrated, which is equivalent to a shutdown. The steam of the external system is connected in parallel and respectively enters a steam generator I13 and a steam generator II14 tube pass concentrated dilute solution through a steam electric regulating valve A11 and a steam electric regulating valve B16 to be condensed into a water outflow unit; the waste heat water is connected in series, firstly enters an evaporator II22 for cooling, then enters an evaporator I27 tube pass for cooling heat to be utilized and then flows out of the unit; the hot water is connected in series with an absorber I28, an absorber II21, a condenser II15 and a condenser I12 in turn, and supplies heat to users after the whole temperature rise process is finished;
when the double-effect refrigerating unit operates in summer, the stop valve A33 is opened, the stop valve B34 is closed, the steam electric control valve B16 is closed, the condenser I12 and the steam generator II14 stop working, the concentrated solution valve A32 and the concentrated solution valve B18 can adjust the flow of corresponding concentrated solutions, the refrigerant water valve A30 and the refrigerant water valve B20 can adjust the flow of corresponding refrigerants and keep the pressure difference between cavities, the steam generator I13 becomes a high-pressure generator of the double-effect refrigerating unit, the high-pressure generator, the low-pressure generator 36, the condenser II15, the evaporator I27, the absorber I28, the heat exchanger I31, the evaporator II22, the absorber II21 and the heat exchanger II17 form the double-effect steam refrigerating unit of which the absorber is divided into two sections, and the double-effect steam refrigerating unit operates according to a parallel refrigerating. Steam of an external system enters a steam generator I13 tube pass concentrated dilute solution through a steam electric regulating valve A11 and is condensed into water to flow out of the unit; cooling water firstly enters the absorber I28 in series, then enters the absorber II21 and then enters the condenser II15 tube pass to bring heat out of the unit; the cold water is serially connected to the evaporator II22 and then to the evaporator I27 for cooling to obtain cold water for the user.
The evaporator absorber is divided into two sections of steam double-effect type solution parallel refrigeration process circulation working principle as follows: the dilute solution is pumped into the high-pressure generator by the solution pump I25 to be concentrated into the concentrated solution, the generated high-temperature refrigerant steam enters the heat transfer pipe of the low-pressure generator 36 through the refrigerant steam communicating pipe 35 to heat the dilute solution pumped into the low-pressure generator 36 by the solution pump II24 to form the concentrated solution, the refrigerant steam in the heat transfer pipe of the low-pressure generator 36 is condensed into refrigerant water, and the refrigerant water enters the U-shaped pipe I29 through the low-pressure generator refrigerant water pipe 37 to enter the evaporator I27 for flash vaporization; refrigerant steam generated by concentrating the dilute solution by the low-pressure generator 36 enters the condenser II15 for condensation, and condensed refrigerant water enters the U-shaped pipe II19 and then enters the evaporator II22 for flash evaporation; refrigerant water which is not flashed in the evaporator I27 is pumped into the surface of a heat transfer pipe of the evaporator I27 by a refrigerant pump I26 to absorb heat and evaporate to prepare cold water, evaporated refrigerant steam enters an absorber I28 and is absorbed by concentrated solution which is sprayed on the surface of the heat transfer pipe of the absorber I28 from a high-pressure generator, and the concentrated solution is changed into dilute solution and enters the bottom of an absorber I28; refrigerant water which is not flashed in the evaporator II22 is pumped into the surface of a heat transfer pipe of the evaporator II22 by a refrigerant pump II23 to absorb heat and evaporate to produce cold water, evaporated refrigerant steam enters an absorber II21 and is absorbed by concentrated solution which comes from a low-pressure generator 36 and is sprayed on the surface of the heat transfer pipe of the absorber II21, the concentrated solution is changed into dilute solution and enters the bottom of an absorber II21, and the concentrated solution absorbs heat released by the refrigerant steam and is taken out of the unit by cooling water. The required cold water is continuously and circularly produced and used by users.
In another embodiment, as shown in fig. 4, the steam generator II14, the condenser II15 and the low pressure generator 36 of the single-effect heating and double-effect cooling two-stage lithium bromide absorption unit of the present invention are in the same cavity, and the low pressure generator is disposed below the steam generator II 14.
In addition to the above embodiments, the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.
Claims (3)
1. A single-effect heating and double-effect refrigerating two-section lithium bromide absorption heat pump unit comprises a steam generator I (13), a condenser I (12), an evaporator I (27), an absorber I (28), a heat exchanger I (31), a solution pump I (25), a refrigerant pump I (26), a steam generator II (14), a condenser II (15), an evaporator II (22), an absorber II (21), a heat exchanger II (17), a solution pump II (24) and a refrigerant pump II (23); the method is characterized in that: the generator condenser shell of the unit also comprises a cavity I (50) and a cavity II (51);
the condenser I (12) and the steam generator I (13) are both arranged in the cavity I (50);
the steam generator II (14) and the condenser II (15) are both arranged in the cavity II (51);
a low-pressure generator (36) is also arranged in the cavity II (51);
a refrigerant steam communicating pipe (35) is arranged between the gas phase area of the steam generator I (13) and the tube side inlet of the low-pressure generator (36);
a low-pressure generator refrigerant water pipe (37) is arranged between the tube side outlet of the low-pressure generator (36) and the inlet of the U-shaped pipe I (29) of the condenser I (12);
a stop valve B (34) is arranged on a hot water pipeline from the condenser II (15) to the condenser I (12);
a cooling water outlet pipe is arranged on the hot water pipeline between the outlet condenser II (15) and the stop valve B (34), and the stop valve A (33) is arranged on the cooling water outlet pipe;
the low-pressure generator (36) is arranged above or below the steam generator II (14).
2. The single-effect heating and double-effect refrigerating two-stage lithium bromide absorption heat pump unit according to claim 1, characterized in that: a steam electric regulating valve A (11) is arranged on a second steam inlet (48) pipeline of the cavity I (50); and a steam electric regulating valve B (16) is also arranged on a first steam inlet (38) pipeline of the cavity II (51).
3. The single-effect heating and double-effect refrigerating two-stage lithium bromide absorption heat pump unit according to claim 1, characterized in that: and a U-shaped pipe II (19) is also arranged between the condenser II (15) and the evaporator II (22).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920915505.9U CN211177494U (en) | 2019-06-18 | 2019-06-18 | Single-effect heating and double-effect refrigerating two-section type lithium bromide absorption heat pump unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920915505.9U CN211177494U (en) | 2019-06-18 | 2019-06-18 | Single-effect heating and double-effect refrigerating two-section type lithium bromide absorption heat pump unit |
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| CN211177494U true CN211177494U (en) | 2020-08-04 |
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| CN201920915505.9U Active CN211177494U (en) | 2019-06-18 | 2019-06-18 | Single-effect heating and double-effect refrigerating two-section type lithium bromide absorption heat pump unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173923A (en) * | 2019-06-18 | 2019-08-27 | 双良节能系统股份有限公司 | A kind of two-period form lithium bromide absorption type heat pump unit of single-action heating double-effect refrigeration |
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- 2019-06-18 CN CN201920915505.9U patent/CN211177494U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173923A (en) * | 2019-06-18 | 2019-08-27 | 双良节能系统股份有限公司 | A kind of two-period form lithium bromide absorption type heat pump unit of single-action heating double-effect refrigeration |
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