CN208720883U - Heat power plant boiler flue gas except wet purification and it is exhaust heat stepped utilize heating system - Google Patents
Heat power plant boiler flue gas except wet purification and it is exhaust heat stepped utilize heating system Download PDFInfo
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- CN208720883U CN208720883U CN201821117071.XU CN201821117071U CN208720883U CN 208720883 U CN208720883 U CN 208720883U CN 201821117071 U CN201821117071 U CN 201821117071U CN 208720883 U CN208720883 U CN 208720883U
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- heat
- flue gas
- exchanger rig
- water supply
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
Abstract
Wet purification is removed the utility model discloses a kind of heat power plant boiler flue gas and exhaust heat stepped using heating system, solve the problems, such as that existing fume afterheat utilization rate is low and flue gas dehumidifying clean-up effect is bad.Including flue gas waste heat recovery heat exchange and dehumidification system, heat supply network circulating water heat-exchanging system and flue gas heating system；Fume afterheat is recycled in first order flue gas waste heat recovery heat-exchanger rig (3), second level flue gas waste heat recovery heat-exchanger rig (6) and the third level flue gas dehumidifying heat-exchanger rig (8), simultaneously, flue gas dehumidifying heat-exchanger rig condensation eliminates water vapour in flue gas, and has recycled the latent heat of water vapour.Flue gas after the heat exchange heat temperature raising in Smoke-heating device (9), is discharged after reaching exhaust temperature.The fume afterheat of recycling is used for heat user (11) heat supply.The utility model has the beneficial effects that having recycled the latent heat of water vapour in flue gas while step recycles heat power plant boiler fume afterheat.
Description
Technical field
The utility model relates to a kind of heat power plant boiler flue gas except wet purification and it is exhaust heat stepped utilize system, be one
Kind removes one kind of moisture and purifying smoke in flue gas while step recovered flue gas heat, drawing vapour latent heat heat supply
Energy-saving and emission-reduction system.
Background technique
In the various heat losses index of heat power plant boiler, the ratio that heat loss due to exhaust gas accounts for boiler Total heat loss is maximum；
Performance becomes apparent in high parameter boiler of power plant, and heat loss due to exhaust gas accounts for the 40%-50% of boiler total losses, even higher.Smoke evacuation temperature
Degree is higher, then heat loss due to exhaust gas is bigger.Using the power plant of Limestone-gypsum Wet Flue Gas Desulfurization Process system, need in spray absorber
It is interior to be cooled down using a large amount of process water, it after so that flue-gas temperature is equilibrated to 45-50 DEG C or so, is just discharged, the heat to be cooled down
Amount wastes.Meanwhile a large amount of process water cooling, increase the humidity of flue gas of discharge, and water vapour has negative electricity
Lotus, encountering secondary pollution in an atmosphere will adsorb, and form bigger particle, and the oxidizing capacity under effect of sunlight can increase
By force, the significant generation that can further increase secondary aerosol species, forms serious aerosol form pollutant, continues catalystic, fermentative at it
Under effect, severe haze will be formed.In addition, " gypsum will be generated around chimney when environment temperature is lower, humidity is larger
Rain " phenomenon generates biggish destruction to environment.In recent years, with the requirement of energy-saving and emission-reduction, the recycling of low-temperature flue gas waste heat,
Widely paid attention to, but the prior art is concentrated mainly on economic feasibility, energy saving analysis and heat and mass etc., for
The thermodynamic behaviour of water vapour and its latent heat lacks attention in low-temperature flue gas, and generated most of waste heat is not in flue gas emission
Have and effectively recycled, flue gas dehumidifying clean-up effect is bad.
Summary of the invention
The utility model provides a kind of heat power plant boiler flue gas except wet purification and exhaust heat stepped using heating system,
Solves the technical problem that existing fume afterheat utilization rate is low and flue gas dehumidifying clean-up effect is bad.
The utility model is to solve the above technical problem by the following technical programs:
A kind of heat power plant boiler flue gas is except wet purification and exhaust heat stepped utilizes heating system, including boiler tail cigarette
Road, air preheater, flue gas waste heat recovery heat-exchanger rig, deduster, desulfuration absorbing tower and chimney, boiler back end ductwork pass through sky
Flue gas input terminal after air preheater with first order flue gas waste heat recovery heat-exchanger rig is connected together, and first order fume afterheat returns
The flue gas output end for receiving heat-exchanger rig passes sequentially through the cigarette of deduster and air-introduced machine and second level flue gas waste heat recovery heat-exchanger rig
Gas input terminal is connected together, and the flue gas output end of second level flue gas waste heat recovery heat-exchanger rig passes through desulfuration absorbing tower and third
The flue gas input terminal of grade flue gas waste heat recovery heat-exchanger rig is connected together, the flue gas of third level flue gas waste heat recovery heat-exchanger rig
Output end is connected together with chimney；The heat-exchanging water output end of first order flue gas waste heat recovery heat-exchanger rig and the first heat supply network recycle
One end of water supply line is connected together, and the other end of the first heat supply network circulating water supply pipeline and the hot water of hot water user connect for water end (W.E.)
Logical the hot water backwater end of hot water user is connected to one end of the second heat supply network circulating water supply pipeline together, and the second heat supply network circulation supplies
The other end of waterpipe is connected to by pumps for hot water supply net with the heat-exchanging water input terminal of third level flue gas waste heat recovery heat-exchanger rig
Together, the heat-exchanging water output end of third level flue gas waste heat recovery heat-exchanger rig is connected to one end of third heat supply network circulating water supply pipeline
Together, the heat-exchanging water input terminal of the other end of third heat supply network circulating water supply pipeline and second level flue gas waste heat recovery heat-exchanger rig
It is connected together, the one of the heat-exchanging water output end of second level flue gas waste heat recovery heat-exchanger rig and the 4th heat supply network circulating water supply pipeline
End is connected together, the other end of the 4th heat supply network circulating water supply pipeline and the heat-exchanging water of first order flue gas waste heat recovery heat-exchanger rig
Input terminal is connected together.
It is provided with Smoke-heating device between the flue gas output end and chimney of third level flue gas waste heat recovery heat-exchanger rig,
Smoke-heating device adds hot water input to be connected together by the 5th water supply line and the first heat supply network circulating water supply pipeline,
Flue gas water supply pump is provided on 5th water supply line, Smoke-heating device adds output end of hot water to pass through the 6th water supply line
It is connected together with the 4th heat supply network circulating water supply pipeline.
The latent heat of water vapour in flue gas is utilized in the utility model, realizes step Mist heat recovering, is reducing boiler
While heat loss due to exhaust gas, reduce the content of water vapour in discharge flue gas, improve the power plant thermal efficiency, reduces air dirt
Contaminate the formation rate of object.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
The utility model is described in detail with reference to the accompanying drawing:
A kind of heat power plant boiler flue gas is except wet purification and exhaust heat stepped utilizes heating system, including boiler back end ductwork
1, air preheater 2, flue gas waste heat recovery heat-exchanger rig, deduster 4, desulfuration absorbing tower 7 and chimney 10, boiler back end ductwork 1
It is connected together by the flue gas input terminal after air preheater 2 with first order flue gas waste heat recovery heat-exchanger rig 3, first order cigarette
The flue gas output end of heat recovery heat exchange device 3 passes sequentially through deduster 4 and air-introduced machine 5 and changes with second level flue gas waste heat recovery more than gas
The flue gas input terminal of thermal 6 is connected together, and the flue gas output end of second level flue gas waste heat recovery heat-exchanger rig 6 passes through desulfurization
Absorption tower 7 and the flue gas input terminal of third level flue gas waste heat recovery heat-exchanger rig 8 are connected together, third level flue gas waste heat recovery
The flue gas output end of heat-exchanger rig 8 is connected together with chimney 10；The heat-exchanging water of first order flue gas waste heat recovery heat-exchanger rig 3 is defeated
Outlet and one end of the first heat supply network circulating water supply pipeline 16 are connected together, the other end of the first heat supply network circulating water supply pipeline 16 with
The hot water of hot water user 11 is connected together for water end (W.E.), the hot water backwater end of hot water user 11 and the second heat supply network circulating water supply pipeline
12 one end connection, the other end of the second heat supply network circulating water supply pipeline 12 are returned by pumps for hot water supply net 13 and third level fume afterheat
The heat-exchanging water input terminal for receiving heat-exchanger rig 8 is connected together, the heat-exchanging water output end of third level flue gas waste heat recovery heat-exchanger rig 8
It is connected together with one end of third heat supply network circulating water supply pipeline 14, the other end and second of third heat supply network circulating water supply pipeline 14
The heat-exchanging water input terminal of grade flue gas waste heat recovery heat-exchanger rig 6 is connected together, second level flue gas waste heat recovery heat-exchanger rig 6
Heat-exchanging water output end and one end of the 4th heat supply network circulating water supply pipeline 15 are connected together, the 4th heat supply network circulating water supply pipeline 15
The heat-exchanging water input terminal of the other end and first order flue gas waste heat recovery heat-exchanger rig 3 is connected together.
Flue gas dress is provided between the flue gas output end and chimney 10 of third level flue gas waste heat recovery heat-exchanger rig 8
9 are set, Smoke-heating device 9 adds hot water input to be connected to by the 5th water supply line 18 with the first heat supply network circulating water supply pipeline 16
Together, flue gas water supply pump 17 is provided on the 5th water supply line 18, Smoke-heating device 9 adds output end of hot water logical
The 6th water supply line 19 is crossed to be connected together with the 4th heat supply network circulating water supply pipeline 15.
The utility model is suitable for the recycling of boiler exhaust gas system waste heat and purification in thermal power plant, especially suitable for flue gas
Measure the low heating network of big, high fume temperature, water capacity big smoke evacuation system and heat supply network return water temperature.
Claims (2)
1. a kind of heat power plant boiler flue gas is except wet purification and exhaust heat stepped utilizes heating system, including boiler back end ductwork
(1), air preheater (2), flue gas waste heat recovery heat-exchanger rig, deduster (4), desulfuration absorbing tower (7) and chimney (10), it is special
Sign is that boiler back end ductwork (1) passes through air preheater (2) cigarette with first order flue gas waste heat recovery heat-exchanger rig (3) afterwards
Gas input terminal is connected together, and the flue gas output end of first order flue gas waste heat recovery heat-exchanger rig (3) passes sequentially through deduster (4)
It is connected together with air-introduced machine (5) and the flue gas input terminal of second level flue gas waste heat recovery heat-exchanger rig (6), more than the flue gas of the second level
The flue gas output end of heat recovery heat exchange device (6) passes through desulfuration absorbing tower (7) and third level flue gas waste heat recovery heat-exchanger rig (8)
Flue gas input terminal be connected together, the flue gas output end of third level flue gas waste heat recovery heat-exchanger rig (8) and chimney (10) are even
Lead to together；The heat-exchanging water output end of first order flue gas waste heat recovery heat-exchanger rig (3) and the first heat supply network circulating water supply pipeline
(16) one end is connected together, and the other end of the first heat supply network circulating water supply pipeline (16) and the hot water of hot water user (11) supply water
End is connected together, and the hot water backwater end of hot water user (11) is connected to one end of the second heat supply network circulating water supply pipeline (12), the
The other end of two heat supply network circulating water supply pipelines (12) passes through pumps for hot water supply net (13) and third level flue gas waste heat recovery heat-exchanger rig
(8) heat-exchanging water input terminal is connected together, the heat-exchanging water output end and third of third level flue gas waste heat recovery heat-exchanger rig (8)
One end of heat supply network circulating water supply pipeline (14) is connected together, the other end of third heat supply network circulating water supply pipeline (14) and the second level
The heat-exchanging water input terminal of flue gas waste heat recovery heat-exchanger rig (6) is connected together, second level flue gas waste heat recovery heat-exchanger rig (6)
Heat-exchanging water output end and one end of the 4th heat supply network circulating water supply pipeline (15) be connected together, the 4th heat supply network circulating water supply pipeline
(15) the heat-exchanging water input terminal of the other end and first order flue gas waste heat recovery heat-exchanger rig (3) is connected together.
2. a kind of heat power plant boiler flue gas according to claim 1 is except wet purification and exhaust heat stepped utilization heat supply system
System, which is characterized in that be provided between the flue gas output end and chimney (10) of third level flue gas waste heat recovery heat-exchanger rig (8)
Smoke-heating device (9), Smoke-heating device (9) add hot water input to follow by the 5th water supply line (18) with the first heat supply network
Ring water supply line (16) is connected together, and is provided with flue gas water supply pump (17) on the 5th water supply line (18), flue gas adds
Thermal (9) adds output end of hot water to be connected to the 4th heat supply network circulating water supply pipeline (15) one by the 6th water supply line (19)
It rises.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821117071.XU CN208720883U (en) | 2018-07-16 | 2018-07-16 | Heat power plant boiler flue gas except wet purification and it is exhaust heat stepped utilize heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821117071.XU CN208720883U (en) | 2018-07-16 | 2018-07-16 | Heat power plant boiler flue gas except wet purification and it is exhaust heat stepped utilize heating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208720883U true CN208720883U (en) | 2019-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821117071.XU Active CN208720883U (en) | 2018-07-16 | 2018-07-16 | Heat power plant boiler flue gas except wet purification and it is exhaust heat stepped utilize heating system |
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| Country | Link |
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| CN (1) | CN208720883U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114162889A (en) * | 2022-02-11 | 2022-03-11 | 中国能源建设集团山西省电力勘测设计院有限公司 | Zero discharge method for wastewater treatment of household garbage incineration power plant |
-
2018
- 2018-07-16 CN CN201821117071.XU patent/CN208720883U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114162889A (en) * | 2022-02-11 | 2022-03-11 | 中国能源建设集团山西省电力勘测设计院有限公司 | Zero discharge method for wastewater treatment of household garbage incineration power plant |
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