CN102997482B - Direct-fired lithium bromide absorption cold-hot water unit for recovering flue gas waste heat under heating working condition - Google Patents
Direct-fired lithium bromide absorption cold-hot water unit for recovering flue gas waste heat under heating working condition Download PDFInfo
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- CN102997482B CN102997482B CN201210552827.4A CN201210552827A CN102997482B CN 102997482 B CN102997482 B CN 102997482B CN 201210552827 A CN201210552827 A CN 201210552827A CN 102997482 B CN102997482 B CN 102997482B
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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
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
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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
- Y02B30/625—Absorption based systems combined with heat or power generation [CHP], e.g. trigeneration
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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Abstract
The invention relates to a direct-fired lithium bromide absorption cold-hot water unit for recovering flue gas waste heat under the heating working condition, belonging to the technical field of air conditioning equipment. The cold-hot water unit comprises a direct-fired high pressure generator (1), a low pressure generator (2), a condenser (3), an evaporator (4), an absorber (5), a low temperature solution heat exchanger (6), a high temperature solution heat exchanger (7), a solution pump (21), a refrigerant pump (22), valves and the like. The cold-hot water unit is characterized in that a flue gas condensation heat exchanger (18) is additionally arranged on a flue gas exhaust outlet pipe of the direct-fired high pressure generator and divides a refrigerant pump outlet refrigerant water pipeline into two ways, wherein one way is connected into the evaporator (4) via a refrigerating refrigerant water valve (15), and the other way is connected into the flue gas condensation heat exchanger (18) via a heating refrigerant water valve (14) and then is connected into a pipeline behind the refrigerating refrigerant water valve (15) to converge or is independently connected into the evaporator (4); the cooling water flows through the absorber and the condenser under the refrigerating working condition; and the heating hot water flows through the absorber and the condenser under the heating working condition. The unit can fully recover the flue gas waste heat and improve the efficiency.
Description
Technical field
The present invention relates to a kind of direct fired lithium bromide absorption type chiller.Belong to air conditioner technical field.
Background technology
Current direct fired lithium bromide absorption type chiller as shown in Figure 1, is made up of the pipeline of direct combustion high pressure generator 1, low pressure generator 2, condenser 3, evaporimeter 4, absorber 5, cryogenic fluid heat exchanger 6, high-temperature solution heat exchanger 7, solution by-passing valve 8, refrigerant vapour valve 9, solution pump 21, cryogenic fluid pump 22, valve, control system (not shown) and connecting components.Unit is when heating operating mode is run, concentrated solution by-passing valve and refrigerant vapour valve are opened, cryogenic fluid pump and external system cooling water pump stop, the low-temperature water heating come from air conditioner user enters in heat exchange pipe of evaporator, heated by the heat of condensation of the water vapour of heat exchange pipe external surface direct combustion high pressure generator heat dilute solution generation, temperature is sent to heating user after raising, the water as refrigerant that solution after direct combustion high pressure generator concentrates enters in absorber and after condensation is mixed into weak solution, is sent to direct combustion high pressure generator again circulates and heat by solution pump.Also has a kind of direct fired lithium bromide absorption type chiller as shown in Figure 2 at present, such as Fig. 1 adds hot-water heater 12, when heating operating mode is run, refrigerant vapour valve cuts out, except direct combustion high pressure generator and hot-water heater, other all shuts down, and the refrigerant vapour gone out by direct combustion high pressure generator directly heats the hot water in heat exchanger tube, refrigerant vapour condenses into water after releasing heat, then flows back to direct combustion high pressure generator.Direct fired lithium bromide absorption type chiller is when heating operating mode, direct combustion high pressure generator exhaust gas temperature is at about 155 DEG C, contain part water vapour in flue gas simultaneously, water vapour saturation temperature is at about 57 DEG C, the sensible heat of this part flue gas and the condensation latent heat of water vapour can account for 10% of fuel combustion caloric value, current straight discharge cannot utilize, and causes the waste of a large amount of fume afterheat, produces the thermal pollution of discharge simultaneously.Because in heating operating mode hot water preparing temperature and flue gas, water vapour saturation temperature is suitable, common direct heat transfer technology is adopted to be difficult to reclaim this part waste heat, how fully to recycle obvious heat of smoke and condensation latent heat in heating operating mode, the efficiency of direct fired lithium bromide absorption type chiller under raising heating operating mode, realize mixed economy and the social benefit of energy-saving and emission-reduction, become one of important topic of research at present.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, the direct fired lithium bromide absorption type chiller that can make full use of smoke evacuation sensible heat and water vapour condensation latent heat during a kind of heating operating mode is provided.
The object of the present invention is achieved like this: a kind of direct fired lithium bromide absorption type chiller of heating operating mode recovered flue gas waste heat of condensation, comprise direct combustion high pressure generator, low pressure generator, condenser, evaporimeter, absorber, cryogenic fluid heat exchanger, high-temperature solution heat exchanger, solution pump and cryogenic fluid pump, valve, the pipeline etc. of control system and connecting components, it is characterized in that: have additional flue gas condensing heat exchanger at direct combustion high pressure generator smoke evacuation outlet, cryogenic fluid pump is exported coolant pipeline and be divided into two tunnels, one tunnel is through refrigeration cryogen water valve access evaporimeter, the pipeline at cryogen water valve rear portion of access refrigeration again after heating cryogen water valve access flue gas condensing heat exchanger, another road converges or accesses evaporimeter separately.During cooling condition, a road water as refrigerant wherein enters evaporimeter through refrigeration cryogen water valve, the pipeline that during heating operating mode, another road water as refrigerant enters access refrigeration cryogen water valve rear portion after the intensification of flue gas condensing heat exchanger through heating cryogen water valve converges or enters evaporimeter separately, and by outer water system valve transfer, when realizing cooling condition, cooling water flow is through absorber and condenser, and during heating operating mode, heating hot water flows through absorber and condenser heats up.
The direct fired lithium bromide absorption type chiller of heating operating mode Mist heat recovering of the present invention, when the hot water line of outer water system and cold water pipeline share identical pipeline, entering between cold (heat) the water water inlet pipe of evaporimeter and the cooling water inlet pipe entering absorber to have the first cross over pipe, this first cross over pipe arranges hot water water intaking valve, going out between the cooling water outlet pipe of condenser and cold (heat) water outlet pipe going out evaporimeter to arrange the second cross over pipe, and hot water effluent's valve is set on this second cross over pipe, the cooling water outlet pipe going out condenser after the second cross over pipe arranges cooling water outlet valve.
The direct fired lithium bromide absorption type chiller of heating operating mode Mist heat recovering of the present invention, when the hot water line of outer water system does not share identical pipeline with cold water pipeline, after entering the cooling water water intaking valve of absorber, set up a road hot water inlet pipe, Bing Gai road hot water inlet pipe arranges hot water water intaking valve; The cooling water outlet pipe going out condenser is set up a road hot water outlet pipe, Bing Gai road hot water outlet pipe arranges hot water effluent's valve, and the cooling water outlet pipe going out condenser after the hot water outlet pipe of this road arranges cooling water outlet valve.
The invention has the beneficial effects as follows:
The present invention is by setting up flue gas condensing heat exchanger and above-mentioned brand-new craft flow in direct combustion high pressure generator smoke evacuation outlet, when heating hot water about 55 DEG C, flue gas exhaust gas temperature can be made to be reduced to less than 30 DEG C, recyclable a large amount of obvious heat of smoke heat and most water vapour condensation latent heat, under the prerequisite not increasing fuel consumption, unit heating capacity and heating efficiency is made to improve more than 10%.When identical heating load, fuel consumption can be reduced and reach more than 10%, reduce operating cost, improve energy utilization rate, and decrease the thermal pollution of smoke evacuation to environment.
To sum up, the present invention, by the recovery to fume afterheat, can increase substantially the heating efficiency of unit, reduces fuel consumption, realizes good economic benefit and social benefit.
Accompanying drawing explanation
Fig. 1 is the operating mode of direct fired lithium bromide absorption type chiller heating in the past schematic diagram.
Fig. 2 is direct fired lithium bromide absorption type chiller direct combustion high pressure generator direct heating operating mode schematic diagram in the past.
Fig. 3 is the heating operating mode schematic diagram that the hot water line of the direct fired lithium bromide absorption type chiller outer water system of heating operating mode Mist heat recovering of the present invention and cold water pipeline share identical pipeline.
Fig. 4 is the hot water line of the direct fired lithium bromide absorption type chiller outer water system of heating operating mode Mist heat recovering of the present invention and the heating operating mode schematic diagram of the shared identical pipeline of cold water pipeline.
Reference numeral in figure:
Direct combustion high pressure generator 1, low pressure generator 2, condenser 3, evaporimeter 4, absorber 5, cryogenic fluid heat exchanger 6, high-temperature solution heat exchanger 7, solution by-passing valve 8, refrigerant vapour valve 9, cooling water water intaking valve 10, cold valves 11, hot-water heater 12, hot water water intaking valve 13, heating cryogen water valve 14, refrigeration cryogen water valve 15, hot water effluent's valve 16, cooling water outlet valve 17, flue gas condensing heat exchanger 18, solution pump 21, cryogenic fluid pump 22.
Detailed description of the invention
As shown in Figure 3, by direct combustion high pressure generator 1, low pressure generator 2, condenser 3, evaporimeter 4, absorber 5, cryogenic fluid heat exchanger 6, high-temperature solution heat exchanger 7, cooling water water intaking valve 10, cold valves 11, hot water water intaking valve 13, heating cryogen water valve 14, refrigeration cryogen water valve 15, hot water effluent's valve 16, cooling water outlet valve 17, flue gas condensing heat exchanger 18, solution pump 21, cryogenic fluid pump 22, the pipeline of control system (not shown) and connecting components, the direct fired lithium bromide absorption type chiller of a kind of heating operating mode Mist heat recovering that valve etc. are formed, it is on direct fired lithium bromide absorption type chiller basis in the past, flue gas condensing heat exchanger 18 has been set up at direct combustion high pressure generator smoke evacuation outlet, cryogenic fluid pump 22 is exported coolant pipeline and is divided into two tunnels, two road coolant pipelines are arranged respectively refrigeration cryogen water valve 15 and heating cryogen water valve 14, during cooling condition, wherein a road water as refrigerant enters evaporimeter 4 through refrigeration cryogen water valve 15, and the pipeline that during heating operating mode, another road water as refrigerant enters access refrigeration cryogen water valve 15 rear portion after flue gas condensing heat exchanger 18 intensification through heating cryogen water valve 14 converges or enters separately evaporimeter 4, hot water line and the cold water pipeline of outer water system share identical pipeline, entering between cold (heat) the water water inlet pipe of evaporimeter 4 and the cooling water inlet pipe entering absorber 5 to establish the first cross over pipe, this first cross over pipe arranges hot water water intaking valve 13, going out between the cooling water outlet pipe of condenser 3 and cold (heat) water outlet pipe going out evaporimeter 4 to arrange the second cross over pipe, and hot water effluent's valve 16 is set on this second cross over pipe, the cooling water outlet pipe going out condenser 3 after the second cross over pipe arranges cooling water outlet valve 17.
When cooling condition runs, close heating cryogen water valve 14, hot water water intaking valve 13 and hot water effluent's valve 16, open refrigeration cryogen water valve 15, cold valves 11, cooling water water intaking valve 10 and cooling water outlet valve 17, evaporimeter 4 passes into cold water, absorber 5, condenser 3 pass into cooling water, flue gas condensing heat exchanger 18 is not enabled, and unit runs by cooling flow in the past;
When heating operating mode is run, open heating cryogen water valve 14, hot water water intaking valve 13 and hot water effluent's valve 16, close refrigeration cryogen water valve 15, cold valves 11, cooling water water intaking valve 10 and cooling water outlet valve 17, heating hot water enters absorber 5 and condenser 3 through superheated water water intaking valve 13 series connection, enable flue gas condensing heat exchanger 18, unit still presses dual-effect refrigeration process flow operation, cryogenic coolant water is after heating cryogen water valve 14 enters the sensible heat of flue gas condensing heat exchanger 18 recovered flue gas and condensation latent heat heats up, enter the cooling of evaporimeter 4 shwoot, the refrigerant vapour produced enters absorber 5 and is absorbed by concentrated solution, bromize lithium concentrated solution releases the heat of condensation of refrigerant vapour when absorbing refrigerant vapour, add the heating hot water in heat absorber 4 heat-transfer pipe.Promoted by cryogenic fluid pump 22 after there is no the water as refrigerant cooling of evaporating and enter flue gas condensing heat exchanger 18 again through heating cryogen water valve 14, form closed cycle, continue the sensible heat and the condensation latent heat that reclaim low-temperature flue gas.The hot water flowing out absorber 5 after heating up enters in condenser 3 heat-transfer pipe, and absorption direct combustion high pressure generator 1 cryogen condensate water shwoot and low pressure generator 2 produce the heat of condensation of secondary refrigerant vapour, are sent to heating user after intensification.The water as refrigerant that condenser 3 condenses enters evaporimeter 4, and according to the difference of fume afterheat ratio, part water as refrigerant enters in absorber 5 bottom solution through the overflow of evaporimeter 4 water pond, realizes the autobalance of heating demand and recovery low temperature exhaust heat load.By above-mentioned brand-new craft flow, the low-temperature flue gas realizing the discharge of direct combustion high pressure generator transfers heat to the water as refrigerant of low temperature by flue gas condensing heat exchanger, the heat of water as refrigerant gives hot water by the absorption process transmission of solution again, fully recycles sensible heat and the condensation latent heat of low-temperature smoke extraction.
As shown in Figure 4, Fig. 4 is the hot water line of the direct fired lithium bromide absorption type chiller outer water system of heating operating mode Mist heat recovering of the present invention and the heating operating mode schematic diagram of the shared identical pipeline of cold water pipeline.It is on the basis of Fig. 3, cancel first and second cross over pipe between cooling water pipe and cold (heat) water pipe, the hot water line of outer water system does not share identical pipeline with cold water pipeline, after entering the cooling water inlet pipe valve of absorber 5, set up a road hot water inlet pipe, and hot water water intaking valve 13 is set on this hot water inlet pipe; The cooling water outlet pipe going out condenser is set up a road hot water outlet pipe, and hot water effluent's valve 16 is set on this hot water outlet pipe, cooling water pipe arranges cooling water outlet valve 17.During cooling condition, close heating cryogen water valve 14, hot water water intaking valve 13 and hot water effluent's valve 16, open refrigeration cryogen water valve 15, cold valves 11, cooling water water intaking valve 10 and cooling water outlet valve 17, evaporimeter 4 passes into cold water, and absorber 5, condenser 3 pass into cooling water; When heating operating mode is run, open heating cryogen water valve 14, hot water water intaking valve 13 and hot water effluent's valve 16, close refrigeration cryogen water valve 15, cold valves 11, cooling water water intaking valve 10 and cooling water outlet valve 17, heating hot water enters absorber 5 and condenser 3 through superheated water water intaking valve 13 series connection.
Above scheme is applicable to evaporimeter-absorber and can is single hop (shown in figure), also can is two sections or multistage.
Claims (4)
1. the direct fired lithium bromide absorption type chiller of a heating operating mode Mist heat recovering, comprise direct combustion high pressure generator (1), low pressure generator (2), condenser (3), evaporimeter (4), absorber (5), cryogenic fluid heat exchanger (6), high-temperature solution heat exchanger (7), solution pump (21) and cryogenic fluid pump (22), valve, it is characterized in that: have additional flue gas condensing heat exchanger (18) at direct combustion high pressure generator smoke evacuation outlet, cryogenic fluid pump is exported coolant pipeline and be divided into two tunnels, one tunnel is through refrigeration cryogen water valve (15) access evaporimeter (4), the pipeline at cryogen water valve (15) rear portion of access refrigeration again after heating cryogen water valve (14) access flue gas condensing heat exchanger (18), another road converges or accesses separately evaporimeter (4), during cooling condition, cooling water flow is through absorber and condenser, during heating operating mode, heating hot water flows through absorber and condenser.
2. the direct fired lithium bromide absorption type chiller of a kind of heating operating mode Mist heat recovering according to claim 1, it is characterized in that: hot water line and the cold water pipeline of outer water system share identical pipeline, entering between the hot and cold water water inlet pipe of evaporimeter and the cooling water inlet pipe entering absorber to have the first cross over pipe, this first cross over pipe arranges hot water water intaking valve (13), going out between the cooling water outlet pipe of condenser and the hot and cold water outlet pipe going out evaporimeter to arrange the second cross over pipe, and hot water effluent's valve (16) is set on this second cross over pipe, the cooling water outlet pipe going out condenser after the second cross over pipe is arranged cooling water outlet valve (17).
3. the direct fired lithium bromide absorption type chiller of a kind of heating operating mode Mist heat recovering according to claim 1, it is characterized in that: the hot water line of outer water system does not share identical pipeline with cold water pipeline, cooling water inlet pipe after the cooling water water intaking valve entering absorber (5) is set up a road hot water inlet pipe, Bing Gai road hot water inlet pipe is arranged hot water water intaking valve (13); The cooling water outlet pipe going out condenser is set up a road hot water outlet pipe, Bing Gai road hot water outlet pipe is arranged hot water effluent's valve (16), and the cooling water outlet pipe going out condenser after the hot water outlet pipe of this road arranges cooling water outlet valve (17).
4. the direct fired lithium bromide absorption type chiller of a kind of heating operating mode Mist heat recovering according to claim 1 or 2 or 3, is characterized in that: described evaporimeter (4) and absorber (5) be single hop, more than two sections or two sections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210552827.4A CN102997482B (en) | 2012-12-19 | 2012-12-19 | Direct-fired lithium bromide absorption cold-hot water unit for recovering flue gas waste heat under heating working condition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210552827.4A CN102997482B (en) | 2012-12-19 | 2012-12-19 | Direct-fired lithium bromide absorption cold-hot water unit for recovering flue gas waste heat under heating working condition |
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| CN102997482A CN102997482A (en) | 2013-03-27 |
| CN102997482B true CN102997482B (en) | 2015-03-11 |
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| CN201210552827.4A Active CN102997482B (en) | 2012-12-19 | 2012-12-19 | Direct-fired lithium bromide absorption cold-hot water unit for recovering flue gas waste heat under heating working condition |
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| CN103291351B (en) * | 2013-05-24 | 2015-01-14 | 中国矿业大学 | Mining-area distributed-type coal-mine gas extraction thermoelectric cooling poly-generation energy resource system |
| CN103542592A (en) * | 2013-09-28 | 2014-01-29 | 昆山市周市溴化锂溶液厂 | Direct combustion type lithium bromide absorption cold and hot water unit with heat recycling function |
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| CN108180671B (en) * | 2017-12-28 | 2023-12-19 | 嘉兴学院 | Lithium bromide absorption refrigerating unit driven by waste heat of internal combustion engine and control method |
| CN108397932B (en) * | 2018-04-09 | 2024-03-08 | 双良节能系统股份有限公司 | Environment-friendly sanitary hot water direct-fired lithium bromide absorption type cold and hot water unit |
| CN108645074A (en) * | 2018-05-22 | 2018-10-12 | 南京舜国宸智能科技有限公司 | Domestic Gas Air-conditioner |
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