CN111089439B - Flue gas enthalpy self-driven purification treatment and heat energy utilization system and use method - Google Patents
Flue gas enthalpy self-driven purification treatment and heat energy utilization system and use method Download PDFInfo
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- CN111089439B CN111089439B CN201911262893.6A CN201911262893A CN111089439B CN 111089439 B CN111089439 B CN 111089439B CN 201911262893 A CN201911262893 A CN 201911262893A CN 111089439 B CN111089439 B CN 111089439B
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 239000003546 flue gas Substances 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000000746 purification Methods 0.000 title claims abstract description 17
- 239000006096 absorbing agent Substances 0.000 claims abstract description 263
- 239000002912 waste gas Substances 0.000 claims abstract description 55
- 238000011084 recovery Methods 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 51
- 239000000498 cooling water Substances 0.000 claims description 18
- 239000007789 gas Substances 0.000 claims description 10
- 238000009833 condensation Methods 0.000 claims description 6
- 230000005494 condensation Effects 0.000 claims description 6
- 238000001704 evaporation Methods 0.000 claims description 4
- 230000008020 evaporation Effects 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 230000008929 regeneration Effects 0.000 claims 2
- 238000011069 regeneration method Methods 0.000 claims 2
- 238000004140 cleaning Methods 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 abstract description 26
- 238000001035 drying Methods 0.000 abstract description 5
- 239000004615 ingredient Substances 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000012855 volatile organic compound Substances 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- F25B30/00—Heat pumps
- F25B30/04—Heat pumps of the sorption type
-
- 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
- F25B33/00—Boilers; Analysers; Rectifiers
-
- 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)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention provides a flue gas purification system, which comprises a first generator, a second generator, a first evaporator, a cooler, a second evaporator, a third evaporator, a first absorber, a first condenser, a second absorber and a second condenser; the invention also provides a use method of the flue gas purification system, and the flue gas purification system uses the heat enthalpy of the waste gas to drive the absorption heat pump to perform waste gas treatment and energy recovery and utilization. The absorption heat pump is driven by the heat energy of the section with higher temperature of the waste gas, the heat enthalpy of the waste gas with higher moisture content is used for driving the second type of temperature-rising absorption heat pump after the temperature of the waste gas is reduced to be close to the saturation temperature, the heat energy with higher temperature is obtained, the absorption heat pump is driven, the waste gas is further cooled by an evaporator to reduce condensable harmful ingredients, and the cooled, purified and dehumidified waste gas is heated by an absorber and a condenser and then discharged into the environment or sent into a drying system.
Description
Technical Field
The invention relates to the technical fields of waste gas purification, cooling, steam generation, absorption heat pumps, absorption refrigeration and the like, in particular to a system for self-driven purification treatment and heat energy utilization of smoke enthalpy and a using method thereof.
Background
Many fields in industrial production relate to purification treatment such as flue gas cooling, filtration, etc., for example, flue gas desulfurization and denitration in thermal power plants, removal of Volatile Organic Compound (VOC) containing waste gas in industries such as textile printing and dyeing, energy recovery of high moisture-containing waste gas in a drying process, etc.
The absorption of harmful components by solvents is a common operation in flue gas purification processes. In order to improve the absorption operation efficiency, the flue gas is often cooled to reduce the operation temperature, which causes energy waste, and meanwhile, the absorbed liquid needs to be regenerated or an absorbent needs to be supplemented, so that the process is complex, the operation cost is high, and when the heat pump is used for recovering the energy of the drying waste gas, partial energy is often discharged to the environment to achieve the energy balance of the drying system, so that the energy waste exists.
Accordingly, there is a need for improvements in the art.
Disclosure of Invention
The invention aims to provide an efficient flue gas enthalpy self-driven purification treatment and heat energy utilization system and a using method thereof.
In order to solve the technical problems, the invention provides a flue gas purification system which comprises a first generator, a second generator, a first evaporator, a cooler, a second evaporator, a third evaporator, a first absorber, a first condenser, a second absorber and a second condenser;
the first generator, the second generator, the first evaporator, the cooler, the second evaporator, the third evaporator, the first absorber, the first condenser, the second absorber and the second condenser are communicated with each other through flue gas channels;
a steam outlet of the first generator is connected with an inlet of a heat exchange tube of the second condenser, an outlet of the heat exchange tube of the second condenser is connected with an inlet of a heat exchange tube of the second evaporator through a first throttling valve, and an outlet of the heat exchange tube of the second evaporator is connected with a gas inlet of the second absorber;
a concentrated solution outlet of the first generator is connected with a concentrated solution inlet of a second absorber through a first solution pump, and a dilute solution outlet of the second absorber is connected with a dilute solution inlet of the first generator;
a steam outlet of the generator II is connected with an inlet of the condenser III, an outlet of the condenser III is connected with an inlet of a heat exchange tube of the evaporator I after passing through the throttle valve III, a steam inlet of a heat exchange tube outlet absorber III of the evaporator I is connected, a dilute solution outlet of the absorber III is connected with a dilute solution inlet of the generator II, and a concentrated solution outlet of the generator II is connected with a concentrated solution inlet of the absorber III through a solution pump VI;
the heat exchange tubes of the absorber III and the generator II are connected with each other through a solution pump VII;
the steam outlet of the generator II is connected with the inlet of the heat exchange tube of the condenser I, the outlet of the heat exchange tube of the condenser I is connected with the inlet of the heat exchange tube of the evaporator III through the throttle valve II, the outlet of the heat exchange tube of the evaporator III is connected with the inlet of the heat exchange tube of the absorber I, the outlet of the heat exchange tube of the absorber I is connected with the dilute solution inlet of the generator II through the solution pump II, and the concentrated solution outlet of the generator II is connected with the concentrated solution inlet of the absorber I through the solution pump III.
The invention also provides a system for recycling heat energy of flue gas and waste gas, which comprises a generator II, an evaporator I, a condenser III, an absorber III, a condenser IV, an absorber IV, a generator III, an evaporator III and a preheater;
a concentrated solution outlet of the generator II is connected with a concentrated solution inlet of the absorber III through a solution pump III, a steam outlet of the generator II is connected with a condenser III inlet, a steam outlet of the condenser III is connected with a steam inlet of the evaporator I through a throttle valve III, a steam outlet of the evaporator I is connected with a steam inlet of the absorber III, and a dilute solution outlet of the absorber III is connected with a dilute solution inlet of the generator II through a solution pump V;
a concentrated solution outlet of the generator III is connected with a concentrated solution inlet of the absorber IV through a solution pump nine,
a steam outlet of the third generator is connected with an inlet of the fourth condenser, an outlet of the fourth condenser is connected with an inlet of the third evaporator through a throttle valve IV, and a steam outlet of the third evaporator is connected with a steam inlet of the fourth absorber;
a dilute solution outlet of the absorber IV is connected with a dilute solution inlet of the generator III through a solution pump IV;
and the outlet of the preheater is connected with the inlet of the heat exchange tube of the fourth absorber, and the outlet of the heat exchange tube of the fourth absorber is connected with the inlet of the heat exchange tube of the third absorber through the seventh solution pump.
The invention also provides a system for recycling high-temperature heat energy, which comprises a generator II, an evaporator I, a condenser III, an absorber III, a condenser IV, an absorber IV, a generator III, an evaporator III, an absorber V, an absorber VI, an evaporator IV and a condenser V;
a concentrated solution outlet of the generator II is connected with a concentrated solution inlet of the absorber III through a solution pump III, a steam outlet of the generator II is connected with a condenser III inlet, a steam outlet of the condenser III is connected with a steam inlet of the evaporator I through a throttle valve III, a steam outlet of the evaporator I is connected with a steam inlet of the absorber III, and a dilute solution outlet of the absorber III is connected with a dilute solution inlet of the generator II through a solution pump V;
a concentrated solution outlet of the generator III is connected with a concentrated solution inlet of the absorber IV through a solution pump nine,
a steam outlet of the third generator is connected with an inlet of the fourth condenser, an outlet of the fourth condenser is connected with an inlet of the third evaporator through a throttle valve IV, and a steam outlet of the third evaporator is connected with a steam inlet of the fourth absorber;
a dilute solution outlet of the absorber IV is connected with a dilute solution inlet of the generator III through a solution pump IV;
the heat exchange tubes of the absorber III and the absorber V are connected with each other through a solution pump VII;
a steam outlet of the absorber V is connected with a steam inlet of the condenser V, a liquid outlet of the condenser V is connected with a liquid inlet of the evaporator IV after passing through the throttle valve V, and a steam outlet of the evaporator IV is connected with a steam inlet of the absorber VI;
a concentrated solution outlet of the absorber V is connected with a concentrated solution inlet of the absorber VI, and a dilute solution outlet of the absorber VI is connected with a dilute solution inlet of the generator II through a solution pump eleven;
and the heat exchange tubes of the evaporator IV and the absorber IV are mutually connected.
The invention also provides a use method of the flue gas purification system, which comprises the following steps:
1) the waste gas firstly enters the first generator and flows through the outer surface of a heat exchange tube of the first generator to release heat, dilute solution which is sprayed on the inner wall surface of the heat exchange tube is heated, the dilute solution is evaporated and concentrated after absorbing heat, generated steam enters the heat exchange tube of the second condenser to be condensed and released in the tube, and the waste gas flowing through the outer surface of the heat exchange tube of the second condenser is heated; the steam is condensed in the heat exchange tube of the second condenser to release heat and then becomes liquid, the liquid enters the heat exchange tube of the second evaporator through the first throttle valve, is evaporated and absorbs heat on the inner wall surface of the heat exchange tube, simultaneously, the waste gas flowing through the outer surface of the evaporated heat exchange tube is cooled, the liquid absorbs heat and becomes gas and then enters the second absorber, the concentrated solution generated in the first generator is also sent into the second absorber through the first solution pump, the concentrated solution is sprayed on the inner wall surface of the heat exchange tube of the second absorber to absorb the steam from the second evaporator, and the waste gas flowing through the outer surface of the heat exchange tube of the second absorber is heated;
2) the waste gas flows out of the generator and then enters the generator II, flows through the outer surface of a heat exchange tube of the generator II, heats a dilute solution sprayed on the inner surface of the heat exchange tube, the generated steam enters the condenser III, is condensed into liquid on the outer surface of the heat exchange tube of the condenser III, flows into the evaporator I after being subjected to three-section flow by the throttle valve, is evaporated and absorbs heat on the inner surface of the heat exchange tube of the evaporator I, and the generated steam enters the absorber III and is absorbed by a concentrated solution sprayed on the outer surface of the heat exchange tube of the absorber III; the solution heated and concentrated in the heat exchange tube of the generator II is sent to the absorber III by the solution pump VI, is sprayed on the outer side of the heat exchange tube of the absorber III to absorb the steam from the evaporator I and release heat to heat the heat carrier in the heat exchange tube, and the heat carrier is driven by the solution pump VII to circulate in the heat exchange tube of the generator II and the heat exchange tube of the absorber III;
3) after flowing out of the evaporator, the waste gas enters the cooler, is further cooled by cooling water in a heat exchange tube of the cooler, enters the evaporator II, flows through the outer surface of the heat exchange tube of the evaporator II, is cooled by liquid evaporated and absorbed on the inner wall surface of the heat exchange tube, enters the evaporator III, flows through the outer surface of the heat exchange tube of the evaporator III, is further cooled by the liquid evaporated and absorbed on the inner wall surface of the heat exchange tube, and is sequentially heated after the humidity is reduced by sequentially flowing through the outer surfaces of the heat exchange tubes of the absorber I, the condenser I, the absorber II and the condenser II;
4) the steam generated in the evaporator II enters the absorber II, is absorbed by the solution sprayed on the inner wall of the heat exchange tube of the absorber II, and releases heat to heat the waste gas flowing through the outer surface of the heat exchange tube of the absorber II; sending the dilute solution of the absorber II into the generator I through the solution pump IV for evaporation and concentration;
5) the steam generated in the generator II enters the heat exchange tube of the condenser I, avoids surface condensation and heat release in the heat exchange tube, heats the waste gas flowing through the outer surface of the heat exchange tube, the condensed liquid enters the evaporator III after being throttled by the throttle valve II, evaporates and absorbs heat on the inner wall surface of the heat exchange tube of the evaporator III, and cools the waste gas flowing through the outer surface of the heat exchange tube of the evaporator III;
6) the concentrated solution produced in the generator II is sent into the absorber I by the solution pump III, is sprayed on the inner wall surface of the heat exchange tube of the absorber I to absorb the steam from the evaporator III, and releases heat to heat the waste gas flowing through the outer surface of the heat exchange tube of the absorber I; in the first absorber, the solution after absorbing the steam is sent to the second generator by the second solution pump, is sprayed on the outer surface of a heat exchange tube of the second generator, is heated by a heat carrying agent in the tube, is evaporated and concentrated, the generated steam enters the first condenser for condensation and heat release, and the concentrated solution is sent to the first absorber by the third solution pump.
The invention also provides a use method of the flue gas and waste gas heat energy recycling system, which comprises the following steps:
1) the flue gas sequentially flows through the generator II, the evaporator I, the generator III, the evaporator III and the preheater, and when the flue gas flows through the components, the flue gas gives off heat, and the temperature is gradually reduced; after the dilute solution in the generator II is concentrated and regenerated into a concentrated solution, the concentrated solution is sent into the absorber III by the solution pump VI and sprayed on a coil pipe of the absorber III;
2) the steam generated in the generator II is cooled by cooling water in the condenser III, condensed into liquid, and then enters the evaporator I after being throttled by the throttle valve, is evaporated in the heat exchange pipe of the evaporator I, absorbs heat from the flue gas flowing out of the heat exchange pipe to become steam, and then enters the absorber III, is absorbed by the concentrated solution from the generator II, releases latent heat, and heats the heat-carrying medium in the coil pipe of the absorber III; the concentrated solution is absorbed by the steam generated by the first evaporator in the third absorber to form a dilute solution, and the dilute solution is sent to the second generator by the fifth solution pump to be regenerated and concentrated to form a concentrated solution;
3) after passing through the second generator and the first evaporator, the flue gas flows through the outer wall surface of the heat exchange tube of the third generator, the dilute solution in the heat exchange tube is heated, and is concentrated into a concentrated solution, and then the concentrated solution is sent into the fourth absorber by the solution pump, the steam generated in the third generator enters the fourth condenser and is cooled by the cooling water in the heat exchange tube of the fourth condenser, after the steam is condensed into liquid, the liquid is throttled and depressurized by the four throttle valves, enters the heat exchange tube of the third evaporator, absorbs heat from the flue gas flowing out of the heat exchange tube and is evaporated, and then the steam enters the fourth absorber, is absorbed by the concentrated solution sprayed on the surface of the heat exchange tube of the fourth absorber, releases latent heat, heats the heat-carrying medium in the heat exchange tube of the fourth absorber, the concentrated solution absorbs the steam and becomes the dilute solution, and then the concentrated solution is sent into the heat exchange tube of the third generator by the solution pump, absorbs heat from the flue gas out of the heat and is regenerated; the flue gas enters the preheater after flowing through the outer wall of the heat exchange tube of the evaporator III, flows through the outer wall of the heat exchange tube of the preheater and preheats the heat-carrying medium in the heat exchange tube;
4) and the heat-carrying medium is sent into the preheater for preheating by the solution pump, enters the absorber IV, is heated and then is sent into the absorber III for heating by the pump.
The invention also provides a use method of the high-temperature heat energy recycling system, which comprises the following steps:
1) the flue gas sequentially flows through the generator II, the evaporator I, the generator III and the evaporator III, and when the flue gas flows through the components, the flue gas gives off heat, and the temperature is gradually reduced; after the dilute solution in the generator II is concentrated and regenerated into a concentrated solution, the concentrated solution is sent into the absorber III by the solution pump VI and sprayed on a coil pipe of the absorber III;
2) the steam generated in the generator II is cooled by cooling water in the condenser III, condensed into liquid, and then enters the evaporator I after being throttled by the throttle valve, is evaporated in the heat exchange pipe of the evaporator I, absorbs heat from the flue gas flowing out of the heat exchange pipe to become steam, and then enters the absorber III, is absorbed by the concentrated solution from the generator II, releases latent heat, and heats the heat-carrying medium in the coil pipe of the absorber III; the concentrated solution is absorbed by the steam generated by the first evaporator in the third absorber to form a dilute solution, and the dilute solution is sent to the second generator by the fifth solution pump to be regenerated and concentrated to form a concentrated solution;
3) after passing through the second generator and the first evaporator, the flue gas flows through the outer wall surface of the heat exchange tube of the third generator, the dilute solution in the heat exchange tube is heated, and is concentrated into a concentrated solution, and then the concentrated solution is sent into the fourth absorber by the solution pump, the steam generated in the third generator enters the fourth condenser and is cooled by the cooling water in the heat exchange tube of the fourth condenser, after the steam is condensed into liquid, the liquid is throttled and depressurized by the four throttle valves, enters the heat exchange tube of the third evaporator, absorbs heat from the flue gas flowing out of the heat exchange tube and is evaporated, and then the steam enters the fourth absorber, is absorbed by the concentrated solution sprayed on the surface of the heat exchange tube of the fourth absorber, releases latent heat, heats the heat-carrying medium in the heat exchange tube of the fourth absorber, the concentrated solution absorbs the steam and becomes the dilute solution, and then the concentrated solution is sent;
4) after absorbing heat in the second generator, the heat-carrying medium is sent into the heat exchange tube of the second generator by the solution pump seventh, the dilute solution sprayed on the outer surface of the heat exchange tube of the second generator is heated, and after releasing heat and reducing the temperature, the heat-carrying medium returns to the heat exchange tube of the third absorber to absorb heat again and raise the temperature; steam generated in the generator II enters the condenser V, is cooled by cooling water in the heat exchange tube of the condenser V, is condensed into liquid, then enters the evaporator IV through the throttle valve V, is sprayed on the outer surface of the heat exchange tube of the evaporator IV to be evaporated, absorbs heat from a heat-carrying medium in the heat exchange tube of the evaporator IV, and enters the absorber VI after becoming steam;
5) the dilute solution is regenerated and concentrated in the generator II, enters the absorber V, is sprayed on the outer surface of the heat exchange tube of the absorber six, absorbs the steam from the evaporator IV and heats the heat-carrying medium in the heat exchange tube of the absorber six; the concentrated solution is sent to the second generator by the eleventh solution pump, is sprayed on the outer surface of the heat exchange tube of the second generator, absorbs heat from the heat-carrying medium in the heat exchange tube of the second generator, and is concentrated and regenerated; and after being heated in the heat exchange tube of the absorber IV, the heat-carrying medium enters the heat exchange tube of the evaporator IV to heat the liquid sprayed on the outer surface of the heat exchange tube of the evaporator IV, and after releasing heat and reducing the temperature, the heat-carrying medium returns to the heat exchange tube of the absorber IV to absorb heat again.
The system, the work flow and the use purpose shown in the embodiment 1 of the invention are different from those of two comparison files.
The embodiment 2 of the present invention is different from the comparison document CN201711228266.1, "a flue gas driven waste heat recovery absorption heat pump": the flow of the comparison document is the well-known flow of the first type absorption heat pump, and the flow of the invention (example 2) is the flow of the second type absorption heat pump, also called a temperature-raising type absorption heat pump, or a heat converter (which is also well-known); another difference is that the second type absorption heat pump is connected in series, so that heat energy with higher temperature can be obtained. The common point is that in the system of the comparison document, the flue gas flows through the generator and the evaporator in sequence, and the flue gas in the comparison document flows through the generator and the evaporator once;
the reference CN201810878182.0 "an absorption heat pump system for recovering flue gas waste heat and condensed water of a gas boiler" also adopts a first type of absorption heat pump, which is different from the second type of absorption heat pump adopted in the present invention. The difference between the first type of absorption heat pump and the second type of absorption heat pump is the heat treatment of the steam produced by the generator, which is utilized in the first type of absorption heat pump, and which is carried away by the cooling water in the second type of absorption heat pump, which has the advantages of lower condensation pressure, and the generator can concentrate the solution to a higher concentration at the same heat source temperature, so that higher temperature heat energy can be obtained in the absorber (the absorber can work at a higher temperature)
Similarly, the system scheme and the process in embodiment 3 of the present invention also have important differences between the second type of absorption heat pump and the first type of absorption heat pump in the comparison document.
The flue gas enthalpy self-driven purification treatment and heat energy utilization system and the using method have the technical advantages that:
the invention uses the heat content of the waste gas to drive the absorption heat pump to process the waste gas and recycle the energy. The absorption heat pump is driven by the heat energy of the section with higher temperature of the waste gas, the heat enthalpy of the waste gas with higher moisture content is used for driving the second type of temperature-rising absorption heat pump after the temperature of the waste gas is reduced to be close to the saturation temperature, the heat energy with higher temperature is obtained, the absorption heat pump is driven, the waste gas is further cooled by an evaporator to reduce condensable harmful ingredients, and the cooled, purified and dehumidified waste gas is heated by an absorber and a condenser and then discharged into the environment or sent into a drying system.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a flue gas purification system;
FIG. 2 is a schematic diagram of a thermal energy recovery system;
FIG. 3 is a schematic diagram of a high temperature heat energy recovery system;
fig. 4 is a schematic diagram of the structure of the generator, evaporator, absorber and condenser.
In the figure, 1, a first generator, 2, a second generator, 22, a third generator, 3, a first evaporator, 5, a second evaporator, 6, a third evaporator, 4, a cooler, 7, a first absorber, 9, a second absorber, 21, a third absorber, 8, a first condenser, 10, a first condenser, 20, a third condenser, 11, a first throttle valve, 13, a second throttle valve, 19, a third throttle valve, 12, a first solution pump, 14, a second solution pump, 15, a third solution pump, 16, a fourth solution pump, 17, a fifth solution pump, 18, a sixth solution pump, 23, a seventh solution pump, 24, a tube plate, 25, a heat exchange tube, 26 fins, 27, a lower header, 29, a shell and 28, an upper header.
Detailed Description
The invention will be further described with reference to specific examples, but the scope of the invention is not limited thereto.
Embodiment 1, a flue gas purification system, as shown in fig. 1, includes a first generator 1, a second generator 2, a first evaporator 3, a cooler 4, a second evaporator 5, a third evaporator 6, a first absorber 7, a first condenser 8, a second absorber 9, and a second condenser 10.
The flue gas channels of the first generator 1, the second generator 2, the first evaporator 3, the cooler 4, the second evaporator 5, the third evaporator 6, the first absorber 7, the first condenser 8, the second absorber 9 and the second condenser 10 are communicated with each other.
The steam outlet of the first generator 1 is connected with the inlet of a heat exchange tube of the second condenser 10, the outlet of the heat exchange tube of the second condenser 10 is connected with the inlet of a heat exchange tube of the second evaporator 5 through a first throttling valve 11, and the outlet of the heat exchange tube of the second evaporator 5 is connected with the gas inlet of the second absorber 9.
The concentrated solution outlet of the generator I1 is connected with the concentrated solution inlet of the absorber II 9 through the solution pump I12, and the dilute solution outlet of the absorber II 9 is connected with the dilute solution inlet of the generator I1.
The steam outlet of the generator II 2 is connected with the inlet of the condenser III 20, the outlet of the condenser III 20 is connected with the inlet of the heat exchange tube of the evaporator I3 after passing through the throttle valve III 19, the outlet of the heat exchange tube of the evaporator I3 is connected with the steam inlet of the absorber III 21, the dilute solution outlet of the absorber III 21 is connected with the dilute solution inlet of the generator II 2, and the concentrated solution outlet of the generator II 2 is connected with the concentrated solution inlet of the absorber III 21 through the solution pump VI 18.
The heat exchange pipes of the absorber III 21 and the generator II 22 are connected with each other through a solution pump VII 23.
The steam outlet of the second generator 22 is connected with the inlet of the heat exchange tube of the first condenser 8, the outlet of the heat exchange tube of the first condenser 8 is connected with the inlet of the heat exchange tube of the third evaporator 6 through the second throttling valve 13, the outlet of the heat exchange tube of the third evaporator 6 is connected with the inlet of the heat exchange tube of the first absorber 7, the outlet of the heat exchange tube of the first absorber 7 is connected with the dilute solution inlet of the second generator 22 through the second solution pump 14, and the concentrated solution outlet of the second generator 22 is connected with the concentrated solution inlet of the first absorber 7 through the third solution pump 15.
The generator I1, the generator II 2, the evaporator I3, the evaporator II 5, the evaporator III 6, the absorber I7, the condenser I8, the absorber II 9 and the condenser II 10 are all the same in structure, and as shown in fig. 4, the generator I, the generator II, the absorber II 9 and the condenser II all comprise a shell 29, and a sprayer, a tube plate 24 and a heat exchange tube 25 are arranged in the shell 29.
An upper header 28, an exhaust gas passage through which exhaust gas passes, and a lower header 27 are partitioned from top to bottom in a shell 29 by upper and lower horizontally disposed tube sheets 24, and a heat exchange tube 25 passes through the two tube sheets 24 and the exhaust gas passage for connecting the upper header 28 and the lower header 27. The heat exchange tube 25 is fixed on the tube plate 24, the heat exchange tube 25 is provided with a fin 26, the fin 26 is positioned in the waste gas channel, the top of the heat exchange tube 25 passes through the tube plate 24 and then is exposed in the upper header 28 for proper length, and a plurality of notches are formed on the part of the heat exchange tube 25. The sprayer in the upper header 28 is positioned right above the heat exchange tube 25 and the tube plate 24, and sprays liquid, and the liquid can flow into the heat exchange tube 25 from the notch and is sprayed on the inner wall of the heat exchange tube 25. The notch can incline at a proper angle, so that the liquid inlet has a rotational flow to a certain degree and is more uniform on the inner wall.
The upper header 28 is provided with a solution inlet (dilute solution inlet, etc.) and is connected with a sprayer, and the upper header 28 can also be provided with a steam outlet; the lower header 27 is provided with a solution outlet (concentrated solution generator, dilute solution absorber, etc.).
The use method of the flue gas purification system comprises the following steps:
waste gas firstly enters the generator I1, flows through the outer surface of the heat exchange tube of the generator I1, releases heat, heats the dilute solution sprayed on the inner wall surface of the heat exchange tube, the dilute solution is evaporated and concentrated after absorbing heat, the generated steam enters the heat exchange tube of the condenser II 10, is condensed in the tube to release heat, and heats the waste gas flowing through the outer surface of the heat exchange tube of the condenser II 10. The steam is condensed in the heat exchange tube of the second condenser 10 to release heat and then becomes liquid, the liquid enters the heat exchange tube of the second evaporator 5 through the first throttle valve 11, the liquid is evaporated and absorbed on the inner wall surface of the heat exchange tube, meanwhile, the waste gas flowing through the outer surface of the heat exchange tube of the second evaporator 5 is cooled, the liquid is absorbed into gas and then enters the second absorber 9, the concentrated solution generated in the first generator 1 is also sent into the second absorber 9 through the first solution pump 12, the concentrated solution is sprayed on the inner wall surface of the heat exchange tube of the second absorber 9 to absorb the steam from the second evaporator 5, and the waste gas flowing through the outer surface of the heat exchange tube of the second absorber 9 is heated.
The waste gas flows out of the generator I1 and then enters the generator II 2, flows through the outer surface of a heat exchange tube of the generator II 2, heats a dilute solution sprayed on the inner surface of the heat exchange tube, the generated steam enters the condenser III 20, is condensed into liquid on the outer surface of the heat exchange tube of the condenser III 20, is throttled by the throttle valve III 19 and then enters the evaporator I3, is sprayed on the inner surface of the heat exchange tube of the evaporator I3 to evaporate and absorb heat, the generated steam enters the absorber III 21 and is absorbed by a concentrated solution sprayed on the outer surface of the heat exchange tube of the absorber III 21; the solution heated and concentrated in the heat exchange tube of the generator II 2 is sent to the absorber III 21 by the solution pump VI 18, is sprayed on the outer side of the heat exchange tube of the absorber III 21, absorbs the steam from the evaporator I3, releases heat to heat the heat carrier in the heat exchange tube, and is driven by the solution pump VII 23 to circulate in the heat exchange tube of the generator II 23 and the heat exchange tube of the absorber III 21.
The waste gas flows out of the evaporator I3 and then enters the cooler 4, the cooler 4 can cool the flue gas by using cooling water to reduce the load of the evaporator behind, the waste gas is further cooled by the cooling water in the heat exchange tube of the cooler 4 and then enters the evaporator II 5, flows through the outer surface of the heat exchange tube of the evaporator II 5, is cooled by the liquid evaporated and absorbed on the inner wall surface of the heat exchange tube, then enters the evaporator III 6, flows through the outer surface of the heat exchange tube of the evaporator III 6 and is further cooled by the liquid evaporated and absorbed on the inner wall surface of the heat exchange tube, and after the humidity is reduced, the waste gas sequentially flows through the outer surfaces of the heat exchange tubes of the absorber I7, the condenser I8, the absorber II 9 and the condenser II 10 and is sequentially heated.
The steam generated in the evaporator II 5 enters the absorber II 9, is absorbed by the solution sprayed on the inner wall of the heat exchange tube of the absorber II 9, and releases heat to heat the waste gas flowing through the outer surface of the heat exchange tube of the absorber II 9; the dilute solution in the second absorber 9 is sent to the first generator 1 through a solution pump four 16 for evaporation and concentration.
Steam generated in the second generator 22 enters the heat exchange tube of the first condenser 8, heat is released through surface condensation in the heat exchange tube, waste gas flowing through the outer surface of the heat exchange tube is heated, condensed liquid enters the third evaporator 6 after being throttled by the second throttling valve 13, heat is absorbed through evaporation on the inner wall surface of the heat exchange tube of the third evaporator 6, and the waste gas flowing through the outer surface of the heat exchange tube of the third evaporator 6 is cooled.
The steam generated in the evaporator III 6 enters the absorber I7, the concentrated solution generated in the generator II 22 is sent to the absorber I7 by the solution pump III 15, is sprayed on the inner wall surface of the heat exchange tube of the absorber I7, absorbs the steam from the evaporator III 6, and releases heat to heat the waste gas flowing through the outer surface of the heat exchange tube of the absorber I7. In the absorber I7, the solution after absorbing the steam is sent to the generator II 22 by the solution pump II 14, is sprayed on the outer surface of a heat exchange tube of the generator II 22, is heated by a heat carrying agent in the tube, is evaporated and concentrated, the generated steam enters the condenser I8 for condensation and heat release, and the concentrated solution is sent to the absorber I7 by the solution pump III 15.
The structures of the generator three 222 and the evaporator three 322 are the same as those of the generator one 1, the generator two 2, the evaporator one 3, the evaporator two 5, and the like in embodiment 1.
The concentrated solution outlet of the generator II 2 is connected with the concentrated solution inlet of the absorber III 21 through a solution pump six 18, the steam outlet of the generator II 2 is connected with the inlet of the condenser III 20, the outlet of the condenser III 20 is connected with the steam inlet of the evaporator I3 through a throttle valve III 19, the steam outlet of the evaporator I3 is connected with the steam inlet of the absorber III 21, and the dilute solution outlet of the absorber III 21 is connected with the dilute solution inlet of the generator II 2 through a solution pump five 17.
The concentrated solution outlet of the third generator 222 is connected to the concentrated solution inlet of the fourth absorber 212 through a solution pump nine 182,
the steam outlet of the third generator 222 is connected with the inlet of the fourth condenser 202, the outlet of the fourth condenser 202 is connected with the inlet of the third evaporator 322 through the fourth throttling valve 192, and the steam outlet of the third evaporator 322 is connected with the steam inlet of the fourth absorber 212.
The dilute solution outlet of the absorber four 212 is connected to the dilute solution inlet of the generator three 222 via the solution pump eight 172.
The outlet of the preheater 422 is connected with the inlet of the heat exchange tube of the absorber IV 212, and the outlet of the heat exchange tube of the absorber IV 212 is connected with the inlet of the heat exchange tube of the absorber III 21 through a solution pump seven 23.
The use method of the flue gas and waste gas heat energy recycling system comprises the following steps:
the flue gas sequentially flows through the second generator 2, the first evaporator 3, the third generator 222, the third evaporator 322 and the preheater 422, and when the flue gas flows through the components, the flue gas gives off heat, and the temperature is gradually reduced; after the dilute solution in the generator II 2 is concentrated and regenerated into a concentrated solution, the concentrated solution is sent into an absorber III 21 by a solution pump six 18 and sprayed on a coil pipe of the absorber III 21; steam generated in the generator II 2 is cooled by cooling water in the condenser III 20, condensed into liquid, throttled by the throttle valve III 19 and then enters the evaporator I3, evaporated in a heat exchange tube of the evaporator I3, absorbs heat from flue gas flowing through the outside of the heat exchange tube to become steam, enters the absorber III 21, is absorbed by concentrated solution from the generator II 2, releases latent heat and heats heat-carrying media in a coil of the absorber III 21; the concentrated solution absorbs the steam generated by the first evaporator 3 in the third absorber 21 to become a dilute solution, and the dilute solution is sent to the second generator 2 by the fifth solution pump 17 to be regenerated and concentrated into a concentrated solution. After flowing through the second generator 2 and the first evaporator 3, the flue gas flows through the outer wall surface of the heat exchange tube of the third generator 222, the dilute solution in the heat exchange tube is heated, and is concentrated into the concentrated solution, and then the concentrated solution is sent into the fourth absorber 212 by the solution pump nine 182, the steam generated in the third generator 222 enters the fourth condenser 202, is cooled by the cooling water in the heat exchange tube of the fourth condenser 202, is condensed into liquid, is throttled and depressurized by the throttle valve four 192, enters the heat exchange tube of the third evaporator 322, absorbs heat from the flue gas flowing out of the heat exchange tube and evaporates, becomes steam, enters the fourth absorber 212, is absorbed by the concentrated solution sprayed on the surface of the heat exchange tube of the fourth absorber 212, releases latent heat, heats the heat carrier in the heat exchange tube of the fourth absorber 212, the concentrated solution absorbs the steam to become the dilute solution, and is sent into the heat exchange tube of the third generator 222 by the solution pump eight 172, and absorbs heat from the flue gas out of the tube and regenerates. The flue gas enters the preheater 422 after flowing through the outer wall of the heat exchange tube of the evaporator III 322, and flows through the outer wall of the heat exchange tube of the preheater 422 to preheat the heat-carrying medium in the heat exchange tube.
The heat-carrying medium is sent to the preheater 422 by the solution pump 232 to be preheated, then enters the absorber IV 212, is heated, and then is sent to the absorber III 21 by the pump to be heated.
Example 3, a system for high temperature heat energy recovery, as shown in fig. 3; the system comprises a generator II 2, an evaporator I3, a condenser III 20, an absorber III 21, a condenser IV 202, an absorber IV 212, a generator III 222, an evaporator III 322, an absorber V203, an absorber VI 204, an evaporator IV 205 and a condenser V206.
The concentrated solution outlet of the generator II 2 is connected with the concentrated solution inlet of the absorber III 21 through a solution pump six 18, the steam outlet of the generator II 2 is connected with the inlet of the condenser III 20, the outlet of the condenser III 20 is connected with the steam inlet of the evaporator I3 through a throttle valve III 19, the steam outlet of the evaporator I3 is connected with the steam inlet of the absorber III 21, and the dilute solution outlet of the absorber III 21 is connected with the dilute solution inlet of the generator II 2 through a solution pump five 17.
The concentrated solution outlet of the third generator 222 is connected to the concentrated solution inlet of the fourth absorber 212 through a solution pump nine 182,
the steam outlet of the third generator 222 is connected with the inlet of the fourth condenser 202, the outlet of the fourth condenser 202 is connected with the inlet of the third evaporator 322 through the fourth throttling valve 192, and the steam outlet of the third evaporator 322 is connected with the steam inlet of the fourth absorber 212.
The dilute solution outlet of the absorber four 212 is connected to the dilute solution inlet of the generator three 222 via the solution pump eight 172.
The heat exchange tubes of the absorber three 21 and the absorber five 203 are connected with each other by a solution pump seven 23.
The vapor outlet of the absorber five 203 is connected with the vapor inlet of the condenser five 206, the liquid outlet of the condenser five 206 is connected with the liquid inlet of the evaporator four 205 after passing through the throttle valve five 207, and the vapor outlet of the evaporator four 205 is connected with the vapor inlet of the absorber six 204.
The concentrated solution outlet of the absorber five 203 is connected with the concentrated solution inlet of the absorber six 204, and the dilute solution outlet of the absorber six 204 is connected with the dilute solution inlet of the generator two 203 through the solution pump eleven 218.
The heat exchange tubes of evaporator four 205 and absorber four 212 are interconnected.
The use method of the high-temperature heat energy recycling system comprises the following steps:
the flue gas flows through the second generator 2, the first evaporator 3, the third generator 222 and the third evaporator 322 in sequence, and when the flue gas flows through the components, the flue gas gives off heat, and the temperature is gradually reduced; after the dilute solution in the generator II 2 is concentrated and regenerated into a concentrated solution, the concentrated solution is sent into an absorber III 21 by a solution pump six 18 and sprayed on a coil pipe of the absorber III 21; steam generated in the generator II 2 is cooled by cooling water in the condenser III 20, condensed into liquid, throttled by the throttle valve III 19 and then enters the evaporator I3, evaporated in a heat exchange tube of the evaporator I3, absorbs heat from flue gas flowing through the outside of the heat exchange tube to become steam, enters the absorber III 21, is absorbed by concentrated solution from the generator II 2, releases latent heat and heats heat-carrying media in a coil of the absorber III 21; the concentrated solution absorbs the steam generated by the first evaporator 3 in the third absorber 21 to become a dilute solution, and the dilute solution is sent to the second generator 2 by the fifth solution pump 17 to be regenerated and concentrated into a concentrated solution. After flowing through the second generator 2 and the first evaporator 3, the flue gas flows through the outer wall surface of the heat exchange tube of the third generator 222, the dilute solution in the heat exchange tube is heated, and is concentrated into the concentrated solution, and then the concentrated solution is sent into the fourth absorber 212 by the solution pump nine 182, the steam generated in the third generator 222 enters the fourth condenser 202, is cooled by the cooling water in the heat exchange tube of the fourth condenser 202, is condensed into liquid, is throttled and depressurized by the throttle valve four 192, enters the heat exchange tube of the third evaporator 322, absorbs heat from the flue gas flowing out of the heat exchange tube and evaporates, becomes steam, enters the fourth absorber 212, is absorbed by the concentrated solution sprayed on the surface of the heat exchange tube of the fourth absorber 212, releases latent heat, heats the heat carrier in the heat exchange tube of the fourth absorber 212, the concentrated solution absorbs the steam to become the dilute solution, and is sent into the heat exchange tube of the third generator 222 by the solution pump eight 172, and absorbs heat from the flue gas out of the tube and regenerates.
After absorbing heat in the second generator 21, the heat-carrying medium is sent into the heat exchange tube of the second generator 203 by the solution pump seven 23, the dilute solution sprayed on the outer surface of the heat exchange tube of the second generator 203 is heated, and after releasing heat and reducing the temperature, the heat-carrying medium returns to the heat exchange tube of the third absorber 21 to absorb heat again and raise the temperature; steam generated in the second generator 203 enters the fifth condenser 206, is cooled by cooling water in the heat exchange tube of the fifth condenser 206, is condensed into liquid, enters the fourth evaporator 205 through the fifth throttle valve 207, is sprayed on the outer surface of the heat exchange tube of the fourth evaporator 205 to be evaporated, absorbs heat from a heat-carrying medium in the heat exchange tube of the fourth evaporator 205 to become steam, and then enters the sixth absorber 204; after being regenerated and concentrated in the second generator 203, the dilute solution enters the fifth absorber 203, is sprayed on the outer surface of the heat exchange tube of the sixth absorber 204, absorbs the steam from the fourth evaporator 205 and heats the heat-carrying medium in the heat exchange tube of the sixth absorber 204; the concentrated solution is changed into dilute solution after absorbing steam in the absorber six 204, and is sent to the generator two 203 by the solution pump eleven 218, and is sprayed on the outer surface of the heat exchange pipe of the generator two 203, absorbs heat from the heat-carrying medium in the heat exchange pipe of the generator two 203, and is concentrated and regenerated. And after being heated in the heat exchange tube of the absorber IV 212, the heat-carrying medium enters the heat exchange tube of the evaporator IV 205 to heat the liquid sprayed on the outer surface of the heat exchange tube of the evaporator IV 205, and after releasing heat and reducing the temperature, the heat-carrying medium returns to the heat exchange tube of the absorber IV 212 to absorb heat again.
Finally, it is also noted that the above-mentioned lists merely illustrate a few specific embodiments of the invention. It is obvious that the invention is not limited to the above embodiments, but that many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.
Claims (4)
1. Flue gas purification system, its characterized in that: the system comprises a first generator (1), a second generator (2), a first evaporator (3), a cooler (4), a second evaporator (5), a third evaporator (6), a first absorber (7), a first condenser (8), a second absorber (9) and a second condenser (10);
the flue gas channels of the first generator (1), the second generator (2), the first evaporator (3), the cooler (4), the second evaporator (5), the third evaporator (6), the first absorber (7), the first condenser (8), the second absorber (9) and the second condenser (10) are communicated;
a steam outlet of the first generator (1) is connected with an inlet of a heat exchange tube of the second condenser (10), an outlet of the heat exchange tube of the second condenser (10) is connected with an inlet of a heat exchange tube of the second evaporator (5) through a first throttling valve (11), and an outlet of the heat exchange tube of the second evaporator (5) is connected with a gas inlet of the second absorber (9);
a concentrated solution outlet of the generator I (1) is connected with a concentrated solution inlet of the absorber II (9) through a solution pump I (12), and a dilute solution outlet of the absorber II (9) is connected with a dilute solution inlet of the generator I (1);
a steam outlet of the generator II (2) is connected with an inlet of a condenser III (20), an outlet of the condenser III (20) is connected with an inlet of a heat exchange tube of the evaporator I (3) after passing through a throttle valve III (19), a heat exchange tube outlet of the evaporator I (3) is connected with a steam inlet of an absorber III (21), a dilute solution outlet of the absorber III (21) is connected with a dilute solution inlet of the generator II (2), and a concentrated solution outlet of the generator II (2) is connected with a concentrated solution inlet of the absorber III (21) through a solution pump VI (18);
the heat exchange tubes of the absorber III (21) and the generator II-1 (22) are connected with each other through a solution pump seven (23);
the steam outlet of the generator II-1 (22) is connected with the inlet of the heat exchange tube of the condenser I (8), the outlet of the heat exchange tube of the condenser I (8) is connected with the inlet of the heat exchange tube of the evaporator III (6) through the throttle valve II (13), the outlet of the heat exchange tube of the evaporator III (6) is connected with the inlet of the heat exchange tube of the absorber I (7), the outlet of the heat exchange tube of the absorber I (7) is connected with the dilute solution inlet of the generator II-1 (22) through the solution pump II (14), and the concentrated solution outlet of the generator II-1 (22) is connected with the concentrated solution inlet of the absorber I (7) through the solution pump III (15).
2. High temperature heat recovery utilizes system, its characterized in that: the system comprises a generator II (2), an evaporator I (3), a condenser III (20), an absorber III (21), a condenser IV (202), an absorber IV (212), a generator III (222), an evaporator III (322), a generator V (203), an absorber VI (204), an evaporator IV (205) and a condenser V (206);
a concentrated solution outlet of the generator II (2) is connected with a concentrated solution inlet of the absorber III (21) through a solution pump six (18), a steam outlet of the generator II (2) is connected with an inlet of the condenser III (20), an outlet of the condenser III (20) is connected with a steam inlet of the evaporator I (3) through a throttle valve III (19), a steam outlet of the evaporator I (3) is connected with a steam inlet of the absorber III (21), and a dilute solution outlet of the absorber III (21) is connected with a dilute solution inlet of the generator II (2) through a solution pump five (17);
the concentrated solution outlet of the generator III (222) is connected with the concentrated solution inlet of the absorber IV (212) through a solution pump nine (182),
the steam outlet of the generator III (222) is connected with the inlet of the condenser IV (202), the outlet of the condenser IV (202) is connected with the inlet of the evaporator III (322) through a throttling valve IV (192), and the steam outlet of the evaporator III (322) is connected with the steam inlet of the absorber IV (212);
a dilute solution outlet of the absorber IV (212) is connected with a dilute solution inlet of the generator III (222) through a solution pump IV (172);
the heat exchange tubes of the absorber III (21) and the generator V (203) are connected with each other through a solution pump seven (23);
a steam outlet of the generator five (203) is connected with a steam inlet of the condenser five (206), a liquid outlet of the condenser five (206) is connected with a liquid inlet of the evaporator four (205) after passing through a throttle valve five (207), and a steam outlet of the evaporator four (205) is connected with a steam inlet of the absorber six (204);
a concentrated solution outlet of the generator five (203) is connected with a concentrated solution inlet of the absorber six (204), and a dilute solution outlet of the absorber six (204) is connected with a dilute solution inlet of the generator five (203) through a solution pump eleven (218);
and the heat exchange tubes of the evaporator four (205) and the absorber four (212) are mutually connected.
3. The method of using the flue gas cleaning system according to claim 1, comprising the steps of:
1) the waste gas firstly enters the generator I (1), flows through the outer surface of a heat exchange tube of the generator I (1), releases heat, heats a dilute solution sprayed on the inner wall surface of the heat exchange tube, the dilute solution absorbs heat and then is evaporated and concentrated, the generated steam enters the heat exchange tube of the condenser II (10), is condensed in the tube to release heat, and heats the waste gas flowing through the outer surface of the heat exchange tube of the condenser II (10); the steam is condensed in a heat exchange tube of a second condenser (10) to release heat and then becomes liquid, the liquid enters a heat exchange tube of a second evaporator (5) through a throttle valve (11), the liquid is evaporated and absorbed on the inner wall surface of the heat exchange tube, meanwhile, the waste gas flowing through the outer surface of the heat exchange tube of the second evaporator (5) is cooled, the liquid is absorbed and becomes gas and then enters a second absorber (9), the concentrated solution generated in the first generator (1) is also sent into the second absorber (9) through a solution pump (12), the concentrated solution is sprayed on the inner wall surface of the heat exchange tube of the second absorber (9) to absorb the steam from the second evaporator (5), and the waste gas flowing through the outer surface of the heat exchange tube of the second absorber (9) is heated;
2) the waste gas flows out of the first generator (1), enters the second generator (2), flows through the outer surface of a heat exchange tube of the second generator (2), is heated to be diluted solution sprayed on the inner surface of the heat exchange tube, generated steam enters the third condenser (20), is condensed into liquid on the outer surface of the heat exchange tube of the third condenser (20), is throttled by the third throttle valve (19), enters the first evaporator (3), is sprayed on the inner surface of the heat exchange tube of the first evaporator (3) to be evaporated and absorb heat, and generated steam enters the third absorber (21) to be absorbed by concentrated solution sprayed on the outer surface of the heat exchange tube of the third absorber (21); the solution heated and concentrated in the heat exchange tube of the generator II (2) is sent to the absorber III (21) by the solution pump six (18), is sprayed on the outer wall surface of the heat exchange tube of the absorber III (21), absorbs the steam from the evaporator I (3), releases heat to heat the heat carrier in the heat exchange tube, and the heat carrier is driven by the solution pump seven (23) to circulate in the heat exchange tube of the generator II-1 (22) and the heat exchange tube of the absorber III (21);
3) the waste gas flows out of the first evaporator (3), enters the cooler (4), is further cooled by cooling water in a heat exchange tube of the cooler (4), enters the second evaporator (5), flows through the outer surface of the heat exchange tube of the second evaporator (5), is cooled by liquid evaporated and absorbed on the inner wall surface of the heat exchange tube, enters the third evaporator (6), flows through the outer surface of the heat exchange tube of the third evaporator (6), is further cooled by the liquid evaporated and absorbed on the inner wall surface of the heat exchange tube, and sequentially flows through the outer surfaces of the heat exchange tubes of the first absorber (7), the first condenser (8), the second absorber (9) and the second condenser (10) after the humidity is reduced, and is sequentially heated;
4) the steam generated in the evaporator II (5) enters an absorber II (9), is absorbed by the solution sprayed on the inner wall surface of the heat exchange tube of the absorber II (9), and releases heat to heat the waste gas flowing through the outer surface of the heat exchange tube of the absorber II (9); sending the dilute solution of the absorber II (9) into the generator I (1) through a solution pump IV (16) for evaporation and concentration;
5) steam generated in the second generator 1 (22) enters the heat exchange tube of the first condenser (8), is condensed on the inner wall surface of the heat exchange tube to release heat, heats waste gas flowing through the outer surface of the heat exchange tube, condensed liquid enters the third evaporator (6) after being throttled by the second throttle valve (13), evaporates and absorbs heat on the inner wall surface of the heat exchange tube of the third evaporator (6), and cools the waste gas flowing through the outer surface of the heat exchange tube of the third evaporator (6);
6) the steam generated in the evaporator III (6) enters the absorber I (7), the concentrated solution generated in the generator II-1 (22) is sent to the absorber I (7) by the solution pump III (15) and is sprayed on the inner wall surface of the heat exchange tube of the absorber I (7) to absorb the steam from the evaporator III (6) and release heat to heat the waste gas flowing through the outer surface of the heat exchange tube of the absorber I (7); in the absorber I (7), the solution after absorbing the steam is sent to the generator II-1 (22) by the solution pump II (14), is sprayed on the outer surface of the heat exchange tube of the generator II-1 (22), is heated by the heat carrying agent in the tube, is evaporated and concentrated, the generated steam enters the condenser I (8) for condensation and heat release, and the concentrated solution is sent to the absorber I (7) by the solution pump III (15).
4. A method of using a high temperature heat energy recovery system as claimed in claim 2, including the steps of:
1) the flue gas sequentially flows through a second generator (2), a first evaporator (3), a third generator (222) and a third evaporator (322), and when the flue gas flows through the components, the flue gas emits heat, and the temperature is gradually reduced; after the dilute solution in the generator II (2) is concentrated and regenerated into a concentrated solution, the concentrated solution is sent into an absorber III (21) by a solution pump six (18) and sprayed on a coil pipe of the absorber III (21);
2) the steam generated in the generator II (2) is cooled by cooling water in a condenser III (20), condensed into liquid, throttled by a throttle valve III (19) and then enters an evaporator I (3), evaporated in a heat exchange tube of the evaporator I (3), absorbs heat from the flue gas flowing through the outside of the heat exchange tube to become steam, enters an absorber III (21), is absorbed by the concentrated solution from the generator II (2), releases latent heat, and heats the heat-carrying medium in a coil of the absorber III (21); the concentrated solution is absorbed by the steam generated by the evaporator I (3) in the absorber III (21) to form a dilute solution, and the dilute solution is sent to the generator II (2) by the solution pump V (17) for regeneration and concentrated to form a concentrated solution;
3) after passing through the second generator (2) and the first evaporator (3), the flue gas flows through the outer wall surface of a heat exchange tube of the third generator (222), a dilute solution in the heat exchange tube is heated, the dilute solution is concentrated into a concentrated solution and then is sent into the fourth absorber (212) by a solution pump nine (182), steam generated in the third generator (222) enters the fourth condenser (202), is cooled by cooling water in the heat exchange tube in the fourth condenser (202), is condensed into a liquid, is throttled and depressurized by a throttle valve four (192), enters the heat exchange tube of the third evaporator (322), absorbs heat from the flue gas flowing out of the heat exchange tube and evaporates, becomes steam, enters the fourth absorber (212), is absorbed by the concentrated solution sprayed on the surface of the heat exchange tube of the fourth absorber (212), releases latent heat, heats a heat-carrying medium in the heat exchange tube of the fourth absorber (212), the concentrated solution absorbs the steam to form a dilute solution, and is sent into the heat exchange tube of the third generator (222) by a solution pump eight (172), absorbing heat from the flue gas outside the pipe for regeneration;
4) after absorbing heat in the absorber III (21), the heat-carrying medium is sent into a heat exchange tube of the generator V (203) by a solution pump seven (23), the dilute solution sprayed on the outer surface of the heat exchange tube of the generator V (203) is heated, the temperature of the released heat is reduced, and the heat-carrying medium returns to the heat exchange tube of the absorber III (21) to absorb heat again and raise the temperature; steam generated in the generator five (203) enters a condenser five (206), is cooled by cooling water in a heat exchange pipe of the condenser five (206), is condensed into liquid, enters an evaporator four (205) through a throttle valve five (207), is sprayed on the outer surface of the heat exchange pipe of the evaporator four (205) to be evaporated, absorbs heat from a heat carrying medium in the heat exchange pipe of the evaporator four (205), becomes steam, and enters an absorber six (204);
5) after being regenerated and concentrated in the generator five (203), the dilute solution enters the absorber six (204), is sprayed on the outer surface of a heat exchange tube of the absorber six (204), absorbs the steam from the evaporator four (205), and heats a heat carrier in the heat exchange tube of the absorber six (204); the concentrated solution is changed into dilute solution after absorbing steam in the absorber six (204), is sent to the generator five (203) by the solution pump eleven (218), is sprayed on the outer surface of the heat exchange pipe of the generator five (203), absorbs heat from the heat-carrying medium in the heat exchange pipe of the generator five (203), and is concentrated and regenerated; and after being heated in the heat exchange tube of the absorber IV (212), the heat-carrying medium enters the heat exchange tube of the evaporator IV (205), heats the liquid sprayed on the outer surface of the heat exchange tube of the evaporator IV (205), and returns to the heat exchange tube of the absorber IV (212) after the heat release temperature is reduced, so that the heat is absorbed again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911262893.6A CN111089439B (en) | 2019-12-11 | 2019-12-11 | Flue gas enthalpy self-driven purification treatment and heat energy utilization system and use method |
Applications Claiming Priority (1)
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| CN2526753Y (en) * | 2001-12-04 | 2002-12-18 | 江苏双良空调设备股份有限公司 | Multi-section lithium bromide absorption heat pump |
| JP2005291535A (en) * | 2004-03-31 | 2005-10-20 | Daikin Ind Ltd | Humidifier |
| CN1967055A (en) * | 2006-08-25 | 2007-05-23 | 李华玉 | Backheating and heating technology by using residual heat of exhaust steam in steam power cycle |
| CN202770044U (en) * | 2012-08-29 | 2013-03-06 | 严建勋 | Coal powder directly-burning type lithium bromide machine set |
| CN109114840A (en) * | 2018-08-09 | 2019-01-01 | 天津大学 | A kind of absorption heat pump processing equipment |
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| US20120102996A1 (en) * | 2010-10-29 | 2012-05-03 | General Electric Company | Rankine cycle integrated with absorption chiller |
| CN204757438U (en) * | 2015-07-22 | 2015-11-11 | 烟台荏原空调设备有限公司 | Second class absorption heat pump |
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| CN2526753Y (en) * | 2001-12-04 | 2002-12-18 | 江苏双良空调设备股份有限公司 | Multi-section lithium bromide absorption heat pump |
| JP2005291535A (en) * | 2004-03-31 | 2005-10-20 | Daikin Ind Ltd | Humidifier |
| CN1967055A (en) * | 2006-08-25 | 2007-05-23 | 李华玉 | Backheating and heating technology by using residual heat of exhaust steam in steam power cycle |
| CN202770044U (en) * | 2012-08-29 | 2013-03-06 | 严建勋 | Coal powder directly-burning type lithium bromide machine set |
| CN109114840A (en) * | 2018-08-09 | 2019-01-01 | 天津大学 | A kind of absorption heat pump processing equipment |
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