CN202452514U - Gas and air independent dehumidification and heating device with gas circulation and waste gas refrigeration - Google Patents

Gas and air independent dehumidification and heating device with gas circulation and waste gas refrigeration Download PDF

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Publication number
CN202452514U
CN202452514U CN2012200123031U CN201220012303U CN202452514U CN 202452514 U CN202452514 U CN 202452514U CN 2012200123031 U CN2012200123031 U CN 2012200123031U CN 201220012303 U CN201220012303 U CN 201220012303U CN 202452514 U CN202452514 U CN 202452514U
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CN
China
Prior art keywords
gas
air
preheater
cooling
lithium bromide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2012200123031U
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Chinese (zh)
Inventor
杨晓辉
张基虎
杨思伦
张梦颖
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YIHENG ENERGY-SAVING TECHNOLOGY JIANGSU CO LTD
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YIHENG ENERGY-SAVING TECHNOLOGY JIANGSU CO LTD
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Priority to CN2012200123031U priority Critical patent/CN202452514U/en
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Publication of CN202452514U publication Critical patent/CN202452514U/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/27Relating to heating, ventilation or air conditioning [HVAC] technologies
    • Y02A30/274Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/62Absorption based systems
    • Y02B30/625Absorption based systems combined with heat or power generation [CHP], e.g. trigeneration
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

The utility model relates to a gas and air independent dehumidification and heating device with gas circulation and waste gas refrigeration. Natural air enters a mixing air cavity through an air cooling demister and an air preheater, and combustion gas sequentially enters the mixing air cavity through a gas cooling demister and a gas preheater. An outlet of an exhaust main pipe of a low-heating-value gas power unit is connected with a heating medium inlet of a lithium bromide refrigerator, a freezing water outlet of the lithium bromide refrigerator is respectively connected with a water inlet of an air cooler and a water inlet of a gas cooler, a water outlet of the air cooler and a water outlet of the gas cooler are respectively connected with a freezing water inlet of the lithium bromide refrigerator, the cooling water outlet of the lithium bromide refrigerator is respectively connected with a water inlet of the air preheater and a water inlet of the gas preheater, a water outlet of the air preheater and a water outlet of the gas preheater are respectively connected with a water feeding pipe of a cooling tower, and a water outlet pipe of the cooling tower is connected with a cooling water inlet of the lithium bromide refrigerator. The gas and air independent dehumidification and heating device can improve combustion efficiency, reduces heat loss in smoke discharging, utilizes waste heat of smoke and improves reliability.

Description

Combustion gas recycled offgas refrigeration gas-air independent humidity control heater
Technical field
The utility model relates to a kind of fuel gas with low heat value generating set, particularly a kind of combustion gas recycled offgas refrigeration gas-air independent humidity control heater.
Background technology
The fuel gas with low heat value generating set is to adapt to the new-generation unit that environmental requirement is developed with the new environment in market, is fuel with Device in Gas, biogas etc. usually, turns waste into wealth, and exhaust emission is low, is the new green environment protection power of replacement fuel oil, coal-fired unit.
During the work of fuel gas with low heat value generating set, comprise air inlet, compression, burning expansion and exhaust process successively, combustible gas is after gas filter filters, successively through spark arrester, magnetic valve, pressure regulator valve, from the fuel gas inlet entering mixed air cavity of mixed air cavity; Natural air filters the air intake entering mixed air cavity of back from mixed air cavity through air cleaner; The gaseous mixture that comes out from mixed air cavity gets into the fuel gas with low heat value generating set after the booster supercharging; Fuel gas with low heat value generating set discharged flue gas gets into exhaust main, and the outlet of exhaust main is equipped with silencer.
Natural air is made up of dry air and steam, promptly contains moisture in the natural air, and especially humidity high season, water capacity can reach 20g/Nm 3More than, than expanding surplus in the of 1600 in liquid lower volume times, so the moisture in the natural air has occupied certain volume to water under gaseous state.The relative humidity of air reaches at 100% o'clock, and airborne moisture reaches capacity, and the air themperature of this moment is called dew-point temperature, and when air themperature dropped to dew-point temperature, airborne water vapour will condense into dew.
It is unstable also must to contain a large amount of moisture content and concentration the Device in Gas of standing out from extraction, the biogas, causes the blast tube corrosion at first easily; Secondly, the combustion gas that contains a large amount of moisture content gets in the generating set, will cause barrel wear, the ignition difficulties of unit, causes the reliability decrease of unit, and it is not enough to exert oneself, and service efficiency is low, and has increased the care and maintenance cost of equipment.When the relative humidity of combustion gas reached 100%, the moisture in the combustion gas reached capacity, and the fuel gas temperature of this moment is called dew-point temperature, and when fuel gas temperature dropped to dew-point temperature, the water vapour in the combustion gas will condense into dew, and for example the dew-point temperature of Device in Gas is about 10 ℃.
In the cylinder body of fuel gas with low heat value generating set; Combustible gas and a certain proportion of air mixed combustion are expanded and are done work, and in combustion process, the steam that contains in combustion gas and the air is not participated in burning; But will absorb heat becomes the high-temperature flue gas discharging, has wasted a large amount of heat energy; In addition, because the existence of steam need be sent into more combustion gas and the air needs to satisfy burning and to exert oneself, more increased heat loss due to exhaust gas.
According to the second law of thermodynamics, heat can not spontaneously be transferred to high temp objects from cryogenic object, realize this process, must consume certain merit, just can make the temperature of cryogenic object lower, reaches the purpose of refrigeration.Lithium-bromide absorption-type refrigerating machine be a kind of be the refrigeration machine of power with the thermal source, mainly form by generator, condenser, evaporimeter, absorber four major parts and equipment such as heat exchanger and solution pump.Lithium bromide refrigerator inside is vacuum environment; For example the shell side of evaporimeter maintenance absolute pressure is 6.54mmHg; Water is 5 ℃ of boilings, and the water as refrigerant spirt is gone will explosive evaporation, when the tube side of the higher chilled water of temperature (for example the being 12 ℃) evaporimeter of flowing through; The water as refrigerant that sprays so outside copper pipe will and evaporate from copper pipe absorption heat, and the chilled water temperature in the copper pipe has just reduced (12 ℃ → 7 ℃); After the water as refrigerant evaporation; The pressure of evaporimeter will raise, and in order to keep the pressure very low (6.54mmHg) in the evaporimeter, absorber absorbs water vapour through the spray bromize lithium concentrated solution; Lithium-bromide solution behind the absorption water vapour becomes weak solution, and concentration reduces can not absorb steam again; Through generator weak solution is concentrated again, in generator, feeds thermal medium, weak solution is carried out indirect, make the water evaporates in the weak solution after solution concentrated, keep absorbability; The isolated steam of generator is cooled off by cooling water in condenser indirectly, and the water as refrigerant of liquefy gets into the evaporimeter spray again, so moves in endless cycles.Therefore the external pipeline of lithium bromide refrigerator has chilled water import, chilled water outlet; Cooling water inlet, coolant outlet; Heating agent import, heating agent outlet.
The utility model content
The purpose of the utility model is; Overcome the problem that exists in the prior art, a kind of combustion gas recycled offgas refrigeration gas-air independent humidity control heater is provided, can improve the efficiency of combustion of fuel gas with low heat value generating set; Reduction is from power consumption; Reduce heat loss due to exhaust gas, simultaneously discharged flue gas is carried out UTILIZATION OF VESIDUAL HEAT IN, improve the reliability and the efficient of whole device.
For solving above technical problem; A kind of combustion gas recycled offgas refrigeration gas-air independent humidity control heater that the utility model provided; Combustible gas and air get into mixed air cavity respectively; The gaseous mixture that said mixed air cavity is discharged gets into the fuel gas with low heat value generating set, and said fuel gas with low heat value generating set institute smoke discharging gets into exhaust main, also comprises air cooling demister, air preheater, combustion gas cooling demister, gas preheater, lithium bromide refrigerator and cooling tower; Natural air gets into said air cooling demister and air preheater successively, and the outlet of air preheater inserts the air intake of said mixed air cavity; Combustible gas gets into said combustion gas cooling demister and gas preheater successively, and the outlet of said gas preheater inserts the fuel gas inlet of said mixed air cavity; The outlet of said fuel gas with low heat value generating set exhaust main inserts the heating agent import of said lithium bromide refrigerator; The chilled water outlet of said lithium bromide refrigerator is connected with the aerial cooler water inlet of said air cooling demister and the combustion gas cooler water inlet of said combustion gas cooling demister respectively, and the combustion gas cooler delivery port of the aerial cooler delivery port of said air cooling demister and said combustion gas cooling demister is connected with the chilled water import of said lithium bromide refrigerator respectively; The coolant outlet of said lithium bromide refrigerator is connected with the air preheater water inlet of said air preheater and the preparatory device water inlet of combustion of said gas preheater respectively; The air preheater delivery port of said air preheater and the preparatory device delivery port of the combustion of said gas preheater are connected with the cooling tower upper hose of said cooling tower respectively, and the cooling tower outlet pipe of said cooling tower is connected with the cooling water inlet of said lithium bromide refrigerator.
With respect to prior art, the utility model has been obtained following beneficial effect: (1) utilizes fuel gas with low heat value generating set discharged flue gas to drive lithium bromide refrigerator and produces chilled water, has effectively utilized the waste heat of fuel gas with low heat value generating set institute smoke discharging.(2) air cooling demister is united two into one by aerial cooler, demister and forms; Cryogenic freezing water gets into aerial cooler; Carry out indirect heat exchange with the air on the aerial cooler surface of flowing through, the temperature of air is cooled to below the dew-point temperature, airborne steam condenses into the globule; And along aerial cooler wall inflow air cooler rhone; The remaining water smoke of air quenched generation is then caught by demister and is got into the air cooler rhone, and oxygen concentration is improved in the cooled dry air that dehumidifies, and gets into air preheater heating back again and gets into mixed air cavity; In like manner; Combustion gas cooling demister is united two into one by combustion gas cooler, demister and forms, and cryogenic freezing water gets into the combustion gas cooler, carries out indirect heat exchange with the combustion gas of the combustion gas cooler surface of flowing through; The temperature of combustion gas is cooled to below the dew-point temperature; Steam in the combustion gas condenses into the globule, and flows into combustion cooler rhone along the combustion gas cooler wall, and the remaining water smoke that the combustion gas quenching produces is then caught by demister and got into combustion cooler rhone; Dehumidifying, gas concentration is improved in the cooled dried combustion gas, gets into gas preheater heating back again and gets into mixed air cavity.(3) steam is not only participated in burning, and also will absorb heat becomes the high-temperature flue gas discharging, and combustion gas and air are through after drying, and the water vapour amount that is discharged in the atmosphere with high-temperature flue gas descends, and heat loss due to exhaust gas significantly descends.(4) combustion gas and air become dried combustion gas and dry air after removing moisture content, and concentration improves and is more stable, and it is higher to exert oneself; Corrosion can not take place in blast tube and air duct; Light a fire more easily after getting into the fuel gas with low heat value generating set, cylinder body also is not easy corrosion, and the care and maintenance cost is low.(5) in the lithium bromide refrigerator; The caloric requirement that the heat that flue gas discharged of fuel gas with low heat value generating set and chilled water cooling are discharged is taken away by cooling water; For cooling water can be recycled; Must use cooling tower that the cooling water after heating up is lowered the temperature, the cooling water after the cooling gets in the lithium bromide refrigerator again, and the heat that cooling water is taken away is relevant with the flow of cooling water and the temperature difference; The high-temperature cooling water that the utility model will come out from lithium bromide refrigerator is at first delivered to air preheater and gas preheater, and in air preheater and gas preheater, high-temperature cooling water carries out indirect heat exchange with cold air and cold combustion gas respectively; The temperature of cold air and cold combustion gas is able to promote, and temperature descends after the high-temperature cooling water release heat, gets into the cooling tower cooling again; Cooling water after the cooling tower cooling flows out from the cooling tower outlet pipe; Again get into the cooling water inlet of lithium bromide refrigerator, air preheater and gas preheater had both reclaimed the waste heat of high-temperature cooling water, and the cold air temperature is got a promotion; Alleviated the load of cooling tower again; Strengthen the cooling water outlet and inlet temperature difference of lithium bromide refrigerator, reduced the power consumption of blower fan of cooling tower, can alleviate the power consumption of cooling water circulating pump again.
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment the utility model is done further detailed explanation, accompanying drawing only provides reference and explanation usefulness, and is non-in order to restriction the utility model.
Fig. 1 is the utility model combustion gas recycled offgas refrigeration gas-air independent humidity control cross-sectional side view.
Among the figure: 1 natural air; 2 air cleaners; 3 air cooling demister; 3a aerial cooler water inlet; 3a ' aerial cooler delivery port; 3b air cooler rhone; 4 air preheaters; 4a dry air inlet; The outlet of 4a ' dry air; 4b air preheater water inlet; 4b ' air preheater delivery port; 5 combustion gas cooling demister; 5a combustion gas cooler water inlet; 5a ' combustion gas cooler delivery port; 5b combustion cooler rhone; 6 gas preheaters; The dried fuel gas inlet of 6a; The dried gas outlet of 6a '; 6b fires preparatory device water inlet; 6b ' fires preparatory device delivery port; 7 lithium bromide refrigerators; The import of 7a chilled water; 7a ' chilled water outlet; The 7b cooling water inlet; 7b ' coolant outlet; The import of 7c heating agent; The outlet of 7c ' heating agent; 8 cooling towers; 8a cooling tower upper hose; 8a ' cooling tower outlet pipe.
The specific embodiment
As shown in Figure 1; The utility model combustion gas recycled offgas refrigeration gas-air independent humidity control heater; Comprise the fuel gas with low heat value generating set; Combustible gas is after gas filter filters, successively through spark arrester, combustion gas cooling demister 5, gas preheater 6, magnetic valve, pressure regulator valve, from the fuel gas inlet entering mixed air cavity of mixed air cavity.After natural air 1 filters through air cleaner 2; Successively through air cooling demister 3, air preheater 4; Get into mixed air cavity from the air intake of mixed air cavity; The gaseous mixture that comes out from mixed air cavity gets into the fuel gas with low heat value generating set after the booster supercharging, fuel gas with low heat value generating set discharged flue gas gets into exhaust main, and the outlet of exhaust main is equipped with silencer.
The outlet of fuel gas with low heat value generating set exhaust main silencer inserts the heating agent import 7c of lithium bromide refrigerator 7, and the tail gas after the release heat exports 7c ' from heating agent and discharges.
Lithium bromide refrigerator is selected flue gas type lithium bromide refrigerator for use; The chilled water outlet 7a ' of lithium bromide refrigerator 7 is connected with the aerial cooler water inlet 3a of air cooling demister 3 and the combustion gas cooler water inlet 5a of combustion gas cooling demister 5 respectively, and the combustion gas cooler delivery port 5a ' of the aerial cooler delivery port 3a ' of air cooling demister 3 and combustion gas cooling demister 5 is connected with the chilled water import 7a of lithium bromide refrigerator 7 respectively.
The coolant outlet 7b ' of lithium bromide refrigerator 7 is connected with the air preheater water inlet 4b of air preheater 4 and the preparatory device water inlet of the combustion 6b of gas preheater 6 respectively; The preparatory device delivery port of the combustion 6b ' of the air preheater delivery port 4b ' of air preheater 4 and gas preheater 6 is connected with the cooling tower upper hose 8a of cooling tower 8 respectively, and the cooling tower outlet pipe 8a ' of cooling tower 8 is connected with the cooling water inlet 7b of lithium bromide refrigerator 7.
Combustion gas cooling demister 5 is united two into one by combustion gas cooler, demister and forms; Cryogenic freezing water gets into the combustion gas cooler; Carry out indirect heat exchange with the combustion gas of the combustion gas cooler surface of flowing through, the temperature of combustion gas is cooled to below the dew-point temperature, the steam in the combustion gas condenses into the globule; And along combustion gas cooler wall inflow combustion cooler rhone 5b; The remaining water smoke that the combustion gas quenching produces is then caught by demister and is got into combustion cooler rhone 5b, and gas concentration is improved in the cooled dried combustion gas that dehumidifies, and gets into gas preheater 6 from dried fuel gas inlet 6a again; Utilize high-temperature cooling water that indirect is carried out in cold combustion gas, the dried combustion gas after the heating is discharged the back from dried gas outlet 6a and is got into mixed air cavity.
Air cooling demister 3 is united two into one by aerial cooler, demister and forms; Cryogenic freezing water gets into aerial cooler; Carry out indirect heat exchange with the air on the aerial cooler surface of flowing through, the temperature of air is cooled to below the dew-point temperature, airborne steam condenses into the globule; And along aerial cooler wall inflow air cooler rhone 3b; The remaining water smoke of air quenched generation is then caught by demister and is got into air cooler rhone 3b, and oxygen concentration is improved in the cooled dry air that dehumidifies, and gets into air preheater 4 from dry air inlet 4a again; Utilize high-temperature cooling water that cold air is carried out indirect, the dry air after the heating exports 4a ' from dry air and discharges back entering mixed air cavity.
More than be merely the preferable possible embodiments of the utility model, non-so the limitation the utility model scope of patent protection.Except that the foregoing description, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of the utility model requirement.

Claims (1)

1. combustion gas recycled offgas refrigeration gas-air independent humidity control heater; Combustible gas and air get into mixed air cavity respectively; The gaseous mixture that said mixed air cavity is discharged gets into the fuel gas with low heat value generating set; Said fuel gas with low heat value generating set institute smoke discharging gets into exhaust main, it is characterized in that: also comprise air cooling demister, air preheater, combustion gas cooling demister, gas preheater, lithium bromide refrigerator and cooling tower; Natural air gets into said air cooling demister and air preheater successively, and the outlet of air preheater inserts the air intake of said mixed air cavity; Combustible gas gets into said combustion gas cooling demister and gas preheater successively, and the outlet of said gas preheater inserts the fuel gas inlet of said mixed air cavity; The outlet of said fuel gas with low heat value generating set exhaust main inserts the heating agent import of said lithium bromide refrigerator; The chilled water outlet of said lithium bromide refrigerator is connected with the aerial cooler water inlet of said air cooling demister and the combustion gas cooler water inlet of said combustion gas cooling demister respectively, and the combustion gas cooler delivery port of the aerial cooler delivery port of said air cooling demister and said combustion gas cooling demister is connected with the chilled water import of said lithium bromide refrigerator respectively; The coolant outlet of said lithium bromide refrigerator is connected with the air preheater water inlet of said air preheater and the preparatory device water inlet of combustion of said gas preheater respectively; The air preheater delivery port of said air preheater and the preparatory device delivery port of the combustion of said gas preheater are connected with the cooling tower upper hose of said cooling tower respectively, and the cooling tower outlet pipe of said cooling tower is connected with the cooling water inlet of said lithium bromide refrigerator.
CN2012200123031U 2012-01-12 2012-01-12 Gas and air independent dehumidification and heating device with gas circulation and waste gas refrigeration Expired - Fee Related CN202452514U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012200123031U CN202452514U (en) 2012-01-12 2012-01-12 Gas and air independent dehumidification and heating device with gas circulation and waste gas refrigeration

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012200123031U CN202452514U (en) 2012-01-12 2012-01-12 Gas and air independent dehumidification and heating device with gas circulation and waste gas refrigeration

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CN202452514U true CN202452514U (en) 2012-09-26

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102562364A (en) * 2012-01-12 2012-07-11 亿恒节能科技江苏有限公司 System for circulating gas, cooling tail gas and dehumidifying and heating mixed gas
CN102563684A (en) * 2012-01-12 2012-07-11 亿恒节能科技江苏有限公司 Fuel gas circulated tail gas refrigerating fuel gas air independent dehumidification heating system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102562364A (en) * 2012-01-12 2012-07-11 亿恒节能科技江苏有限公司 System for circulating gas, cooling tail gas and dehumidifying and heating mixed gas
CN102563684A (en) * 2012-01-12 2012-07-11 亿恒节能科技江苏有限公司 Fuel gas circulated tail gas refrigerating fuel gas air independent dehumidification heating system

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GR01 Patent grant
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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120926

Termination date: 20160112