CN104633636A - Saturated steam combined boiler and quick steam manufacturing method - Google Patents
Saturated steam combined boiler and quick steam manufacturing method Download PDFInfo
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- CN104633636A CN104633636A CN201310567191.5A CN201310567191A CN104633636A CN 104633636 A CN104633636 A CN 104633636A CN 201310567191 A CN201310567191 A CN 201310567191A CN 104633636 A CN104633636 A CN 104633636A
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Abstract
The invention provides a saturated steam combined boiler and a quick steam manufacturing method. The saturated steam combined boiler comprises a combustor, a furnace chamber, a boiler shell, a flow pipe bundle and a reversal combustion chamber, wherein the combustor is arranged on the front portion of a combustion chamber, the furnace chamber is arranged in the combustion chamber and used for combustion of fuel, the flow pipe bundle is arranged above the combustion chamber, and the reversal combustion chamber is connected with the end of the flow pipe bundle and the tail end of the combustion chamber. The saturated steam combined boiler is characterized in that the saturated steam shell type combined boiler with a built-in heat exchanger at least comprises two boiler bodies including the normally-used boiler body and the standby boiler body, the two boiler bodies are each provided with an energy saver and a condenser, the standby boiler body is further provided with the heat exchanger except the energy saver and the condenser, and a steam bypass outlet of the normally-used boiler body is connected with a heat exchange steam inlet of the heat exchanger of the standby boiler body. By the adoption of the combined boiler, the rising speed of the temperature of water in water pipes can be increased, the moisture content in flue gas is reduced, harmful gases in the flue gas are reduced, and energy waste caused by different steam consumptions at different time periods is avoided.
Description
Technical field
Saturated vapor combined boiler and Quick steam manufacture method, particularly saturated vapor combined boiler and saturated vapor preparation method field, belong to field of boilers.
Background technology
For a long time, as the boiler of heating equipment, the main Coal Energy Source that uses heats.Because coal-burning boiler can produce a large amount of flue gases, meeting contaminated air, meanwhile, the slag through burning is also a kind of environmental contaminants.
In the last few years, China found and had exploited a large amount of natural gases, established the heavy construction of transfering natural gas from the west to the east, meanwhile, had introduced the pipelines such as external natural gas, fuel oil, had provided comparatively hydrocarbon rich resource.
Along with the raising of environmental consciousness, the continuous progress of science and technology, add oil gas type fuel and have the convenience being easy to carry and use, environmental pollution is minimum, the feature that calorific capacity is high.Using oil gas Substitute coal, is the new way improving city environmental quality.
Start to put on market as the boiler plant of fuel using fuel oil and combustion gas, and obtain and apply, use clean energy resource boiler to become a kind of trend.Some areas and industry start restriction and build coal heating boiler, thus use natural gas, oil burning boiler.But for steam boiler, the energy resource consumption of boiler is relatively large, because device in equipment is subject to the impact of hyperthermia and superheating, there will be fault in various degree, just needs once break down to shut down, this will certainly affect normal production.
Utilize the boiler of combustion gas and fuel oil, the flue gas of discharge has quite high temperature 150 ~ 250 DEG C, containing steam about 15% ~ 19%(volume composition in it), be the major vectors of flue gas heat.On the one hand, be discharged in air and can increase CO
2, SO
2, NOx etc. causes climate warming, in addition, the flue gas self-temperature in flue, just at about 150 ~ 250 DEG C, has a great impact climate warming tool.
If the exhaust gas temperature of boiler is dropped to enough low level, so in flue gas, water vapour will condense and release the latent heat of vaporization, and the latent heat of vaporization in flue gas is reclaimed.
Condenser boiler is except can absorbing the potential heat in flue gas, and due in water vapor condensation process, condensed water can absorb a part of pernicious gas, reduces the discharge of pollutant, is conducive to environmental protection.
It is low that traditional boiler also exists smoke heat energy transfer capability, and temperature can not drop to desirable degree, and the problem such as maintenance frequency is high, whole efficiency is low, the life-span is short, how can overcome these problems, be the problem that boiler needs to solve.
In addition, in practice, often the quantity of steam of boiler output and the quantity of steam of client use are not mate completely, sometimes do not mate with the steam production of boiler in the steam use amount of Different periods client yet, there will be or quantity of steam residue, or the quantity of steam of client is not enough.For the boiler that time that is large for the energy consumed, cost is long, if can not use in time or be discharged, be all a kind of phenomenon of wasting very much.On the contrary, in order to cut the waste, if when client does not use steam stoppage in transit boiler, once client need, be difficult to provide steam in time because from cold water heat, need cost certain hour promote water temperature, reach evaporating state, need regular hour and the energy.In this condition, or with regard to longtime running boiler, meet the demand of client, when client is without steam, remaining discharge of steam is fallen; When the clients such as shutdown use, rerun boiler.But the frequent intensification of boiler or cooling, this is a kind of waste inherently, also has certain influence, and can bring operating instability to the life-span of equipment.How solving this predicament, is the difficult problem that heating power department faces.
Summary of the invention
The technical problem that the present invention solves is long for general boiler manfacturing steaming time, energy consumption large, the quantity of steam of boiler output and client make steam consumption can not mate completely at Different periods, bring waste of steam, the problem that high cost, whole efficiency are low, its objective is and provide one neither to waste energy, saturated vapor combined boiler and the Quick steam manufacture method of quantity of steam needed for client can be met again.
The technical scheme that the present invention takes: saturated vapor combined boiler, the burner arranged before comprising burner hearth, the flue of burner hearth fuel combustion, boiler shell, be arranged on the flowing bundle above burner hearth, connect the return combustion chamber of flowing bundle end and burner hearth end, be positioned at the forehearth smoke box of boiler front upper part, be positioned at the flue at boiler top, described built-in heat exchanger type saturated vapor pan shell type combined boiler at least comprises two boilers, comprising conventional utility boiler and stand-by boiler, two kinds of boilers are all equipped with energy-saving appliance and condenser, described stand-by boiler is except being provided with energy-saving appliance and condenser, also be provided with heat exchanger, the outlet of conventional utility boiler steam by-pass is connected with the heat exchanger heat exchange steam inlet of stand-by boiler, tube side one end of described energy-saving appliance is connected with softened water tank, the other end is connected with boiler internal, the tube side two ends of described condenser are connected with softened water tank, circulating-heating is carried out to the water in softened water tank, described energy-saving appliance is made up of gilled tube, gilled tube is that high-frequency welding processes, shell side one end of energy-saving appliance is connected with convection heating surface, the other end is connected with the shell side of condenser, tube side one end of energy-saving appliance is connected with boiler internal, the other end is connected with softened water tank, the heating surface of described condenser is made up of high frequency welded fin-tube.
Quick steam manufacture method, described saturated vapor combined boiler, the burner arranged before comprising burner hearth, the flue of burner hearth fuel combustion, boiler shell, be arranged on the flowing bundle above burner hearth, connect the return combustion chamber of flowing bundle end and burner hearth end, be positioned at the forehearth smoke box of boiler front upper part, be positioned at the flue at boiler top, it is characterized in that: described built-in heat exchanger type saturated vapor pan shell type combined boiler at least comprises two boilers, comprising conventional utility boiler and stand-by boiler, two kinds of boilers are all equipped with energy-saving appliance and condenser, described stand-by boiler is except being provided with heat exchanger and condenser, also be provided with heat exchanger, the outlet of conventional utility boiler steam by-pass pipe is connected with the heat exchanger heat exchange steam inlet of stand-by boiler, it is characterized in that: described saturated vapor method for fast mfg comprises:
A: be provided with condenser in flue, the flue gas entered in flue of the water conservancy in condenser, to the water preheat in condenser, the water of preheating is through water tank, again enter in energy-saving appliance and carry out heat exchange, water temperature again promoted, the water of heating turns back in boiler, in the boiler, fuel is fully burned in burner hearth, and flame and flue gas are upwards turned back 90 ° in return combustion chamber, enter convection bank, again to entering hot water heating in boiler, form saturated vapor;
B: described conventional utility boiler main steam mouth is provided with by-pass line, the saturated vapor exporting out from conventional utility boiler saturated vapor delivers to pot heat exchanger heat exchange steam inlet for subsequent use by by-pass line, heat exchange steam enters the heat exchanger tube in bobbin carriage, and carry out abundant heat exchange at heat exchanger tube along journey and pot water, again from heat exchange steam (vapor) outlet out, water in the stand-by boiler of heating remains on 90 ° of about C, and when steam requirement increases, stand-by boiler starts fast provides steam.
The good effect that saturated vapor combined boiler and Quick steam manufacture method have is: utilize this combined boiler that the water temperature in stand-by boiler can be made to reach about 90 DEG C, after stand-by boiler starts, in boiler, water can seethe with excitement at once, produce saturated vapor, the hoisting velocity of water temperature in water pipe can be accelerated, reduce the moisture in flue gas, reduce the pernicious gas in flue gas, solve the energy waste brought because time period steam consumption is different, the fault rate reducing device in stove, ensure normal production, reduce energy resource consumption, the service life of prolonged boiler.
Accompanying drawing explanation
Fig. 1 is traditional dry back of the body formula two pass boiler side profile schematic diagram.
Fig. 2 is saturated vapor combined boiler side profile schematic diagram.
Fig. 3 is the front schematic view of three saturated vapor combined boilers.
Fig. 4 is the heat exchanger generalized section be assembled in bottom stand-by boiler.
Detailed description of the invention
Fig. 1 is traditional dry back of the body formula two backhaul smaller hard flour pancake boiler side profile schematic diagram.Be described with regard to the steam manufacturing process of conventional boiler referring to Fig. 1.
Fig. 1 is traditional dry back of the body formula two backhaul smaller hard flour pancake boiler.In figure 100: return combustion chamber, 101: front smoke box, 102: smoke box, 103: combustion port, 104: burner hearth, 105: corrugated flue, 106: convection bank.
It is below the steam manufacture process in conventional boiler.Combustion gas or fuel oil are lighted by the burner be connected in combustion port 103, burn in burner hearth 104, in order to prevent flue expanded by heating, generally be designed to be able to the corrugated flue 105 alleviating thermal expansion, flue gas after burning enters convection bank 106 through return combustion chamber 100, through coming and going the flue gas of flowing, the water heating in boiler is become steam (or hot water) and sends client, a small amount of flue gas of generation is discharged from flue.
The process producing saturated vapor in conventional utility boiler is as follows: arrange condenser 207 in flue, water conservancy in condenser 207 flue gas entered in flue, to the water preheat in condenser 207, the water of preheating is through water tank, again enter in energy-saving appliance 208 and carry out heat exchange, water temperature is promoted again, the water of heating turns back in boiler, in the boiler, fuel is fully burned in burner hearth 104, and flame and flue gas are upwards turned back 90 ° in return combustion chamber 100, enter convection bank 106, again to entering hot water heating in boiler, form saturated vapor.
As mentioned above, the energy consumed aborning due to conventional boiler is large, spended time is long, and meanwhile, this boiler is difficult to the problem meeting client closed portion boiler when the energy waste that different time sections steam consumption difference is brought or gas consumption are lacked.The specific embodiments addressed this is that with regard to technical solution of the present invention referring to Fig. 2, Fig. 3, Fig. 4 is described.
Fig. 2 is saturated vapor combined boiler side profile schematic diagram.Wherein 100: return combustion chamber, 101: front smoke box, 104: burner hearth, 105: corrugated flue, 106: convection bank, 108: burner, 109: heat exchanger, 206: flue, 208: energy-saving appliance, 207: condenser.
Fig. 3 is the front schematic view of three saturated vapor combined boilers.Wherein, A: conventional utility boiler, B and C: stand-by boiler, 301A: saturated vapor outlet, 502: heat exchange steam inlet.
Fig. 4 is assembled in the heat exchanger profile bottom stand-by boiler.Wherein, 501: heat exchange steam (vapor) outlet, 502: heat exchange steam inlet, 503: bobbin carriage, 504: heat exchanger tube, 505: supporting seat,
Be described with regard to the steam manufacture process of saturated vapor combined boiler referring to Fig. 2, Fig. 3, Fig. 4.
Described saturated vapor combined boiler at least comprises two boilers, wherein has conventional utility boiler and stand-by boiler, and between two kinds of boilers, steam pipe is connected, and is all equipped with energy-saving appliance and condenser in boiler.In the present embodiment, be provided with a conventional utility boiler A, two stand-by boiler B and C.In actual use, at least will conventional utility boiler be set, or at least will stand-by boiler be set.Mutual saturated vapor interconnects, and described boiler is all provided with condenser 207, energy-saving appliance 208.
In saturated vapor combined boiler, the flow process of flue gas is as follows: first burner 108 fire fuel, fuel is fully burned in burner hearth 104, flame and flue gas are upwards turned back 90 ° in return combustion chamber 100, enter convection bank 106, flue gas is after convection bank 106 out, enter the energy-saving appliance 208 arranged above smoke channel box 101, the condenser 207 arranged in flue 206 again, finally, discharge from chimney.In order to prevent flue expanded by heating, being designed to corrugated flue 105, in order to ensure safety, after burner hearth 104, being provided with explosion proof door.The bottom of stand-by boiler is provided with heat exchanger 109.
Below the detailed process utilizing saturated vapor to add banked boiler water: the lifting process of described stand-by boiler water temperature illustrates with reference to Fig. 4, and Fig. 4 is the heat exchanger profile be assembled in bottom stand-by boiler.It is made up of heat exchange steam inlet 502, bobbin carriage 503, heat exchanger tube 504 heat exchanger, supporting seat 505 and heat exchange steam (vapor) outlet 501.Described heat exchanger 109 is arranged on the bottom of stand-by boiler B and stand-by boiler C.Described conventional utility boiler main steam mouth is provided with by-pass line, from conventional utility boiler saturated vapor outlet 301A saturated vapor out, main steam delivers to user, another part steam, heat exchange steam inlet 502 place, the saturated vapor of being delivered to the heat exchanger 109 arranged bottom stand-by boiler B and stand-by boiler C by by-pass line enter the heat exchanger tube 504 be arranged in bobbin carriage 503, and carry out abundant heat exchange at heat exchanger tube 504 along journey and pot water, send from heat exchange steam (vapor) outlet 501.Water in the stand-by boiler of heating remains on 90 ° of about C, once need to open stand-by boiler, will reach capacity state at once.Same according to the mode identical with conventional utility boiler A, in stand-by boiler B and stand-by boiler C, form saturated vapor, supply gas to client.
Utilize the process of flue gas cooling water, purifying smoke as follows: the condenser 207 arranged in the flue of boiler top, what send into the pipe inlet of condenser 207 is cooling soft water, it utilizes water pump to be extracted in condenser 207, in the spiral fin coil of cooling water in condenser 207, with enter in flue the high-temperature flue gas filled the air outside spiral fin coil and carry out heat exchange, cooling water temperature gets a promotion, during this period, water utilization condensation reason in flue gas, moisture in flue gas becomes water in dew-point temperature, and the tube side cooling water after intensification turns back to softened water tank high-temperature water side.
Utilize the process of flue gas raising water temperature as follows: to utilize the cooler-water temperature that condenser 207 promotes, water pump is again utilized to deliver to energy-saving appliance 208 from softened water tank high temperature side, in energy-saving appliance 208, warm water in finned tube utilizes flue-gas temperature heat exchange again in shell side, after elevating the temperature, tube side port of export high-temperature water is out delivered in boiler.
Described condenser 207 not only reduces exhaust gas temperature, also eliminates the partial oxidation of water in water tank simultaneously, improves boiler life; Save required fuel in boiler startup process, for 1 ton of steam boiler, amount of consumed gas is 70.91Nm
3/ h, then every platform boiler starts at every turn and can save 5X70.91=354.55 Nm
3/ h fuel.
This saturated vapor combined boiler and Quick steam manufacture method are in condenser 207, take full advantage of the fume afterheat in flue and the cooling water in condenser 207, have played condensation, have purified the pernicious gas in flue gas, eliminated the moisture in flue gas; In energy-saving appliance 208, the waste heat that make use of in flue gas improves water temperature, has saved energy consumption, in stand-by boiler, make use of heat exchanger 109, promotes and maintains the water temperature in stand-by boiler B and stand-by boiler C, can achieve steam within a short period of time and make.
For 5t × h
-1steam boiler, before installing condensed heat exchanger additional, design efficiency calculates h=88.01% by low heat valve, uses the minimizing of different load down smoke-discharging heat loss and the raising (see table 4) more than 6% of boiler thermal output after condensed heat exchanger.After condensed heat exchanger is installed, natural gas about 650 m of this stove actual saving every day
3, every m
3gas Prices about 2.35 yuan, then save more than 1500 yuan in one day, within 1 year, within 360 days, calculates, then save natural gas about 540000 m every year by operation
3, amount to RMB about about 550,000 yuan.The cost of two-stage heat exchanger, installation and debugging expense and maintenance cost about 250,000 yuan altogether.Investment payback time is about 5 months.
Another effect of flue gas condensing is the discharge reducing NOx.Its reason is the raising of the condenser boiler thermal efficiency on the one hand, decreases the consumption of fuel, reduces total release; Condensate liquid is to the absorption of NOx on the other hand, further reduces discharge again.
Claims (6)
1. saturated vapor combined boiler, the burner arranged before comprising burner hearth, the flue of burner hearth fuel combustion, boiler shell, be arranged on the flowing bundle above burner hearth, connect the return combustion chamber of flowing bundle end and burner hearth end, be positioned at the forehearth smoke box of boiler front upper part, be positioned at the flue at boiler top, it is characterized in that: described built-in heat exchanger type saturated vapor pan shell type combined boiler at least comprises two boilers, comprising conventional utility boiler and stand-by boiler, two kinds of boilers are all equipped with energy-saving appliance and condenser, described stand-by boiler is except being provided with energy-saving appliance and condenser, also be provided with heat exchanger, the outlet of conventional utility boiler steam by-pass is connected with the heat exchanger heat exchange steam inlet of stand-by boiler.
2. saturated vapor combined boiler according to claim 1, is characterized in that: tube side one end of described energy-saving appliance is connected with softened water tank, and the other end is connected with boiler internal.
3. saturated vapor combined boiler according to claim 1, is characterized in that: the tube side two ends of described condenser are connected with softened water tank, carry out circulating-heating to the water in softened water tank.
4. saturated vapor combined boiler according to claim 1, it is characterized in that: described energy-saving appliance is made up of gilled tube, gilled tube is that high-frequency welding processes, shell side one end of energy-saving appliance is connected with convection heating surface, the other end is connected with the shell side of condenser, tube side one end of energy-saving appliance is connected with boiler internal, and the other end is connected with softened water tank.
5. saturated vapor combined boiler according to claim 1, is characterized in that: the heating surface of described condenser is made up of high frequency welded fin-tube.
6. Quick steam manufacture method, the burner arranged before adopting described saturated vapor combined boiler to comprise burner hearth, the flue of burner hearth fuel combustion, boiler shell, be arranged on the flowing bundle above burner hearth, connect the return combustion chamber of flowing bundle end and burner hearth end, be positioned at the forehearth smoke box of boiler front upper part, be positioned at the flue at boiler top, it is characterized in that: described built-in heat exchanger type saturated vapor pan shell type combined boiler at least comprises two boilers, comprising conventional utility boiler and stand-by boiler, two kinds of boilers are all equipped with energy-saving appliance and condenser, described stand-by boiler is except being provided with energy-saving appliance and condenser, also be provided with heat exchanger, the outlet of conventional utility boiler steam by-pass is connected with the heat exchanger heat exchange steam inlet of stand-by boiler, it is characterized in that: the method for fast mfg of described saturated vapor comprises:
A: be provided with condenser in flue, the flue gas entered in flue of the water conservancy in condenser, to the water preheat in condenser, the water of preheating is through water tank, again enter in energy-saving appliance and carry out heat exchange, water temperature again promoted, the water of heating turns back in boiler, in the boiler, fuel is fully burned in burner hearth, and flame and flue gas are upwards turned back 90 ° in return combustion chamber, enter convection bank, again to entering hot water heating in boiler, form saturated vapor;
B: described conventional utility boiler main steam mouth is provided with by-pass line, the saturated vapor exporting out from conventional utility boiler saturated vapor delivers to pot heat exchanger heat exchange steam inlet for subsequent use by by-pass line, heat exchange steam enters the heat exchanger tube in bobbin carriage, and carry out abundant heat exchange at heat exchanger tube along journey and pot water, again from heat exchange steam (vapor) outlet out, water in the stand-by boiler of heating remains on 90 ° of about C, and when steam requirement increases, stand-by boiler starts fast provides steam.
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| CN201310567191.5A CN104633636A (en) | 2013-11-15 | 2013-11-15 | Saturated steam combined boiler and quick steam manufacturing method |
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| CN201310567191.5A CN104633636A (en) | 2013-11-15 | 2013-11-15 | Saturated steam combined boiler and quick steam manufacturing method |
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| CN104633636A true CN104633636A (en) | 2015-05-20 |
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ID=53212686
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| CN201310567191.5A Pending CN104633636A (en) | 2013-11-15 | 2013-11-15 | Saturated steam combined boiler and quick steam manufacturing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110793187A (en) * | 2019-12-09 | 2020-02-14 | 珠海格力电器股份有限公司 | Gas water heating system and control method thereof |
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| CN202769627U (en) * | 2012-07-04 | 2013-03-06 | 江阴济化新材料有限公司 | Boiler with heating device on the bottom |
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| JPH0763303A (en) * | 1993-08-27 | 1995-03-07 | Yoshiharu Tachibana | System for utilizing combustion exhaust gas of boiler |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110793187A (en) * | 2019-12-09 | 2020-02-14 | 珠海格力电器股份有限公司 | Gas water heating system and control method thereof |
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Application publication date: 20150520 |