CN205372599U - Gas oil fired boiler flue gas waste heat step recovery system - Google Patents
Gas oil fired boiler flue gas waste heat step recovery system Download PDFInfo
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- CN205372599U CN205372599U CN201620075232.8U CN201620075232U CN205372599U CN 205372599 U CN205372599 U CN 205372599U CN 201620075232 U CN201620075232 U CN 201620075232U CN 205372599 U CN205372599 U CN 205372599U
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- heat exchanger
- pump
- gas
- recovery system
- boiler
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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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Abstract
The utility model relates to a gas oil fired boiler flue gas waste heat step recovery system, including boiler, air supply mechanism and normal atmospheric temperature pond, the flue gas pipeline of boiler is connected with first heat exchanger and second heat exchanger in order in discharge flue gas direction, air supply mechanism and normal atmospheric temperature pond continuous with second heat exchanger and boiler through first heat exchanger respectively. Compared with the prior art, the utility model has the advantages of simple structure, the thermal losses is few, the heat utilization efficiency is high, energy -conserving effect is obvious.
Description
Technical field
This utility model belongs to residual heat from boiler fume and reclaims field, is specifically related to a kind of gas/oil-fired boiler fume afterheat cascade recovery system.
Background technology
Industrial Boiler is the thermal powerplant that China is main, and ubiquity heat utilization ratio lowly in the use of present Industrial Boiler, and residual heat of exhaust flue gas crosses the problems such as height.Along with China's rapid economic development, energy resource consumption increases day by day, and the problem that urban air quality goes from bad to worse is prominent all the more.In thermal power, energy consumption is high, and with serious pollution one of the main reasons is exactly the discharge of boiler smoke, and boiler exhaust gas problem is in that the direct pollution of flue gas pollutant on the one hand, is exactly too high exhaust gas temperature on the other hand.
The too high exhaust gas temperature of boiler can be recycled, and utilizes in patent CN203980639U at existing residual heat from boiler fume, it is provided that one is segmentation condensation gas boiler flue gas waste heat recovery apparatus step by step.System is controlled including Multi-section condenser step by step and boiler continuous water feeding, described boiler continuous water feeding controls system one end and connects Multi-section condenser step by step, the other end connects boiler, described boiler continuous water feeding controls system and includes softened water tank, high-order softened water tank, small pump and variable frequency pump, described softened water tank one end is connected with high-order softened water tank by small pump, high-order softened water tank connects Multi-section condenser step by step, the softened water tank other end connects boiler by variable frequency pump, is also connected with overflow pipe between high-order softened water tank and softened water tank.This patent has carried out 3 grades of continuous coolings, it is necessary to two-stage softened water tank, and equipment is many, and cost is high, and application has limitation.
Summary of the invention
Defect that the purpose of this utility model is contemplated to overcome above-mentioned prior art to exist and a kind of simple in construction is provided, thermal losses is few, heat utilization efficiency is high, the obvious gas/oil-fired boiler fume afterheat cascade recovery system of energy-saving effect.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of gas/oil-fired boiler fume afterheat cascade recovery system, including boiler, air feed mechanism and room temperature pond, the flue of boiler has been sequentially connected with First Heat Exchanger and the second heat exchanger on discharge flue gas direction, and described air feed mechanism is connected with boiler respectively through First Heat Exchanger and the second heat exchanger with room temperature pond.
Described First Heat Exchanger is heat pipe preheater.
The second described heat exchanger is finned heat exchanger.
The water inlet of the second described heat exchanger is connected with room temperature pond, and the outlet of the second heat exchanger is connected with boiler, is additionally provided with bypass duct between outlet and the room temperature pond of the second heat exchanger.
Described bypass duct is provided with bypass valve.
It is provided with force (forcing) pump between described room temperature pond and the water inlet of the second heat exchanger, between described the second heat exchanger and boiler, is provided with feed pump.
Being additionally provided with backup line between outlet and the boiler of the second described heat exchanger, backup line is provided with stand-by pump.
Water inlet and the outlet of described feed pump, force (forcing) pump and stand-by pump are equipped with valve, and outlet further respectively has check (non-return) valve.
Described feed pump, force (forcing) pump and stand-by pump are variable frequency pump.
Being additionally provided with sewage draining exit on the second described heat exchanger, sewage draining exit is provided with blowoff valve.
The high-temperature flue gas that boiler fuel combustion produces first passes around First Heat Exchanger by flue, flue gas obtains lower temperature flue gas after the first heat-exchanger rig, high-temperature flue gas carries out heat exchange with the cold air sucked by air feed mechanism, cold air heat absorption heats up and forms hot blast, and hot blast introduction of boiler reduces the consumption of boiler oil.Relatively low-temperature flue gas is made to pass through the second heat exchanger by flue, room temperature pond provides normal-temperature water, power is provided by pressure pump, normal-temperature water enters the second heat exchanger by valve and check-valves and carries out heat exchange with lower temperature flue gas, normal-temperature water heat absorption heats up and forms high-temperature water, being thered is provided power by feed pump, high-temperature water is by valve and the stop valve supply feed water system of boiler.Again reduce formation low-temperature flue gas in flue-gas temperature after the second heat-exchanger rig, finally by air-introduced machine, low-temperature flue gas is introduced chimney and discharge.
First Heat Exchanger can make high-temperature flue gas that boiler produces and clean Cryogenic air heat exchange, adds hot-air, reduces flue-gas temperature, and be delivered in boiler by the air of heating.
Finned heat exchanger is a kind of water/flue gas heat-exchange unit, the normal-temperature water that room temperature pond provides is driven by pressure pump and is delivered to finned heat exchanger, with the relatively low-temperature flue gas heat exchange again formed through First Heat Exchanger cooling, heating normal-temperature water, reduce flue-gas temperature, and the normal-temperature water that will heat up is delivered to boiler water system.
Its effect of stand-by pump is consistent with feed pump, starts when feed pump breaks down or keeps in repair, to ensure that system is properly functioning.
Bypass duct with superfluous water being returned again pressurization pump intake, simultaneously can balance system pressure, maintain system stability.
Compared with prior art, this utility model has the advantage that
This systematic heat utilization is high, and heat exchange grade can be reduced, and adopt different media to carry out heat exchange, first the air that specific heat capacity is little is heated, lower temperature flue-gas temperature can will not be made too low while higher temperature air heating, then re-using this lower temperature flue gas the water that specific heat capacity is bigger is heated, water is heated by the heat making full use of flue gas, flue-gas temperature is reduced to more low-level simultaneously and discharges.Adopt two-stage heat sink, first make high-temperature flue gas and clean Cryogenic air heat exchange, reduce flue-gas temperature, heat pure air, and pure air is delivered to boiler, improve air themperature in boiler, reduce fuel and use.Then, again by the flue gas of upper level and normal-temperature water heat exchange, thoroughly reduce flue-gas temperature, and the normal-temperature water of heating be delivered to the feed water system of boiler, again reduce the consumption of fuel, reach energy-conservation, reduce discharging, reduce the multipurpose of exhaust gas temperature.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model；
In figure, 1 is boiler, and 2 is First Heat Exchanger, 3 is air feed mechanism, and 4 is air-introduced machine, and 5 is the second heat exchanger, 6 is room temperature pond, and 7 is force (forcing) pump, and 8 is force (forcing) pump imported valve, 9 is force (forcing) pump outlet valve, 10 is force (forcing) pump check (non-return) valve, and 11 is inlet valve, and 12 is feed pump, 13 is feed pump imported valve, 14 is feed pump outlet valve, and 15 is feed pump check (non-return) valve, and 16 is stand-by pump imported valve, 17 is stand-by pump, 18 is stand-by pump outlet valve, and 19 is stand-by pump check (non-return) valve, and 20 is blowoff valve, 21 is bypass valve, and 22 is chimney.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, this utility model is described in detail.
Embodiment
A kind of gas/oil-fired boiler fume afterheat cascade recovery system, as shown in Figure 1, including boiler 1, air feed mechanism 3 and room temperature pond 6, the flue of boiler 1 has been sequentially connected with First Heat Exchanger 2 and the second heat exchanger 5 discharging on flue gas direction, and then flue gas is delivered to chimney 22 by air-introduced machine 4 by flue.Air feed mechanism 3 is connected with boiler 1 with the second heat exchanger 5 respectively through First Heat Exchanger 2 with room temperature pond 6.
Wherein, First Heat Exchanger 2 is heat pipe preheater.Second heat exchanger 5 is finned heat exchanger, room temperature pond 6 is connected with the water inlet of the second heat exchanger 5, the outlet of the second heat exchanger 5 is connected with boiler 1, it is additionally provided with bypass duct between outlet and the room temperature pond 6 of the second heat exchanger 5, second heat exchanger is additionally provided with sewage draining exit, and sewage draining exit is connected to blowoff valve 20.nullWherein，Pipeline between room temperature pond 6 and the water inlet of the second heat exchanger 5 is provided with force (forcing) pump 7，Force (forcing) pump 7 be respectively arranged at two ends with force (forcing) pump imported valve 8 and force (forcing) pump outlet valve 9，Pipeline between force (forcing) pump outlet valve 9 and the second heat exchanger 5 is additionally provided with force (forcing) pump check (non-return) valve 10，The outlet of the second heat exchanger 5 is provided with inlet valve 11，It is connected to two branch lines，One branch line is connected with boiler 1，Which is provided with feed pump 12，Feed pump 12 is respectively arranged at two ends with feed pump imported valve 13 and feed pump outlet valve 14，Pipeline between feed pump outlet valve 14 and boiler 1 is additionally provided with feed pump check (non-return) valve 15，Spare duct arranged side by side with it is also had with this branch line，Spare duct is provided with stand-by pump 17，Stand-by pump 17 is respectively arranged at two ends with stand-by pump imported valve 16 and stand-by pump outlet valve 18，Stand-by pump check (non-return) valve 19 it is additionally provided with between stand-by pump outlet valve 18 and boiler 1；Another branch line is bypass duct, is connected with room temperature pond 6, which is provided with bypass valve 21.The feed pump 12 of the present embodiment, force (forcing) pump 7 and stand-by pump 17 are variable frequency pump.
Claims (10)
1. a gas/oil-fired boiler fume afterheat cascade recovery system, including boiler, air feed mechanism and room temperature pond, it is characterized in that, the flue of boiler has been sequentially connected with First Heat Exchanger and the second heat exchanger on discharge flue gas direction, and described air feed mechanism is connected with boiler respectively through First Heat Exchanger and the second heat exchanger with room temperature pond.
2. a kind of gas/oil-fired boiler fume afterheat cascade recovery system according to claim 1, it is characterised in that described First Heat Exchanger is heat pipe preheater.
3. a kind of gas/oil-fired boiler fume afterheat cascade recovery system according to claim 1, it is characterised in that the second described heat exchanger is finned heat exchanger.
4. a kind of gas/oil-fired boiler fume afterheat cascade recovery system according to claim 1, it is characterized in that, the water inlet of the second described heat exchanger is connected with room temperature pond, the outlet of the second heat exchanger is connected with boiler, is additionally provided with bypass duct between outlet and the room temperature pond of the second heat exchanger.
5. a kind of gas/oil-fired boiler fume afterheat cascade recovery system according to claim 4, it is characterised in that described bypass duct is provided with bypass valve.
6. a kind of gas/oil-fired boiler fume afterheat cascade recovery system according to claim 4, it is characterised in that be provided with force (forcing) pump between described room temperature pond and the water inlet of the second heat exchanger, be provided with feed pump between described the second heat exchanger and boiler.
7. a kind of gas/oil-fired boiler fume afterheat cascade recovery system according to claim 4 or 6, it is characterised in that being additionally provided with backup line between outlet and the boiler of the second described heat exchanger, backup line is provided with stand-by pump.
8. a kind of gas/oil-fired boiler fume afterheat cascade recovery system according to claim 7, it is characterised in that water inlet and the outlet of described feed pump, force (forcing) pump and stand-by pump are equipped with valve, and outlet further respectively has check (non-return) valve.
9. a kind of gas/oil-fired boiler fume afterheat cascade recovery system according to claim 7, it is characterised in that described feed pump, force (forcing) pump and stand-by pump are variable frequency pump.
10. a kind of gas/oil-fired boiler fume afterheat cascade recovery system according to claim 1, it is characterised in that being additionally provided with sewage draining exit on the second described heat exchanger, sewage draining exit is provided with blowoff valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620075232.8U CN205372599U (en) | 2016-01-26 | 2016-01-26 | Gas oil fired boiler flue gas waste heat step recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620075232.8U CN205372599U (en) | 2016-01-26 | 2016-01-26 | Gas oil fired boiler flue gas waste heat step recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205372599U true CN205372599U (en) | 2016-07-06 |
Family
ID=56270166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620075232.8U Expired - Fee Related CN205372599U (en) | 2016-01-26 | 2016-01-26 | Gas oil fired boiler flue gas waste heat step recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205372599U (en) |
-
2016
- 2016-01-26 CN CN201620075232.8U patent/CN205372599U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160706 Termination date: 20200126 |