CN105299894A - Gas-fired hot water boiler air circulation energy saving system - Google Patents
Gas-fired hot water boiler air circulation energy saving system Download PDFInfo
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- CN105299894A CN105299894A CN201510853939.7A CN201510853939A CN105299894A CN 105299894 A CN105299894 A CN 105299894A CN 201510853939 A CN201510853939 A CN 201510853939A CN 105299894 A CN105299894 A CN 105299894A
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Abstract
The invention relates to a gas-fired hot water boiler air circulation energy saving system which comprises a boiler body, two burners, a flue, a chimney, energy savers, a water-cooling type condenser, a secondary air type condenser and a primary air type condenser, wherein the two burners arranged at intervals in an up-and-down manner are mounted at one end of the boiler body; a flue gas outlet is formed at the other end of the boiler body, and is in sealing connection with the flue; an outlet of the flue is connected to the upright chimney; the energy savers sequentially arranged in a two-stage manner are mounted in the flue between the boiler body and the chimney; the chimney is provided with the water-cooling type condenser, the secondary air type condenser and the primary air type condenser from bottom up sequentially; an air blower is communicated with and mounted at one side of the lower part of the chimney; and an exhaust outlet of the air blower is communicated with air inlets of the burners of the boiler body through sealed pipelines. The gas-fired hot water boiler air circulation energy saving system operates stably, is safe and reliable, has strong output, is high in efficiency and low in exhaust gas temperature, reaches flue gas emission indexes, and meets the requirements of market development better.
Description
Technical field
The invention belongs to the equipment in central heating field, city, especially a kind of gas-fired water heating boiler air circulation energy-saving system.
Background technology
This equipment belongs to the capital equipment in city large-scale centralized heating field, and large-scale city, the environmental protection and energy saving field heating coal advocated for current national changes the gas-fired water heating boiler air circulation energy-saving system that gas engineering uses.Along with improving constantly of domestic level, society is strict gradually to the environmental requirement around living area, large-scale business's house, civilian house community generally adopted coal burning water heating heating boiler in the past, there is more serious dust to periphery living area, poison gas pollutes, city is usually shrouded among fog flue dust.For improving city people's living standard, city starts to advocate Blue Sky Project, uses gas-fired water heating boiler air circulation energy-saving system to replace the coal-burning boiler of high pollution, extending capacity reformation on existing burning coal boiler room basis on a large scale.At present, domestic gas-fired water heating boiler air circulation energy-saving system field is in Rapid development stage, more needs to constantly bring forth new ideas, studies, improves, use of the new technology, new material reached energy-conserving and environment-protective more, adapt to the demand in market.
Through the application of nearly 3-4, domestic larger gas heating water boiler tentatively captures domestic market, but also research and probe is in larger gas fired-boiler, operating experience feedback and evaluation, lack relevant design experiences, along with national standard is to boiler thermal output, under fume emission NOx value constantly requires harsh environment, original gas-fired water heating boiler air circulation energy-saving system thermal efficiency 95%, NOx far from adapts to the renewal speed in standard and market at 120-150mg/Nm3, therefore, at the thermal efficiency, flue gas NOx index, the aspects such as exhaust gas temperature reach the main direction of studying that higher breakthrough becomes larger gas heating water boiler.
Through retrieval, find the patent document of following near field:
A kind of gas fired-boiler or Central Air-Conditioner fume afterheat total heat recovery system and method (CN105066219A), comprise gas fired-boiler or Central Air-Conditioner, one or more heat exchanger, air-introduced machine, one or more condenser, heat pump, gas fired-boiler or Central Air-Conditioner high temp. flue and heat exchanger, air-introduced machine, condenser connects successively, outside the flue gas output junction chamber of condenser, flue gas waste heat recovery system hot water connects and is divided into parallel connection and/or series connection two kinds of modes, parallel way is: hot water return pipe divides two-way to connect heat exchanger and heat pump respectively, heat exchanger exports with heat pump and is connected heating system.Series system is: hot water return pipe connects heat pump, and the water outlet of heat pump connects heat exchanger, and heat exchanger exports and connects heating system.The fume afterheat of gas fired-boiler or Central Air-Conditioner is all recycled by the present invention, for heating, health hot water, moisturizing heating and other process application, reaches energy-conservation, lowers consumption, reduces discharging object.
A kind of superconductive gas-fired boiler of energy-efficient normal-pressure horizontal (CN104913498A), comprises interior stove cylinder, outer furnace tube, elbow, flue, heat pipe, inlet tube and outlet tube and blow-off pipe; Described interior stove cylinder is arranged in outer furnace tube, is provided with blind rivet between interior stove cylinder and outer furnace tube, and is provided with burner opening on interior stove cylinder; Described flue is by elbow syndeton, flue is provided with heat pipe, and is connected with flue outlet on flue; Described outer furnace tube, flue and heat pipe are installed in built-in perlitic clad plate; The superconductive gas-fired boiler of this energy-efficient normal-pressure horizontal, the appropriate super heat-conductive pipe of multiple smoke-box welding distribution, is not only applied to afterbody waste heat recovery super heat-conductive pipe technology, is more rationally applied on boiler combustion cell structure, add radiation of burner hearth and convection heat transfer' heat-transfer by convection area, improve the thermal efficiency; The continuous 90 degree of turn designs of flue make flue gas flow rate rationally reduce in addition, decrease the erosive wear to super heat-conductive pipe, extend the service life of heat pipe and boiler.
Through contrast, the technology contents of present patent application and above-mentioned public technology and prior art all have relatively big difference, have better thermal efficiency and energy saving.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art part, the gas-fired water heating boiler air circulation energy-saving system providing a kind of structure simple, reasonable in design, energy-efficient, easy to maintenance.
The present invention solves its technical problem and takes following technical scheme to realize:
A kind of gas-fired water heating boiler air circulation energy-saving system, it is characterized in that: comprise body of heater, burner, flue, chimney, energy-saving appliance, water-cooling type condenser, second level air type condenser and first order air type condenser, body of heater one end is provided with, lower spaced two burners, the body of heater other end is shaped with exhanst gas outlet and is sealedly connected with flue, the outlet of flue is connected to vertical chimney, the energy-saving appliance that two-stage order is arranged is installed in the flue between body of heater and chimney, chimney is provided with water-cooling type condenser from bottom to top successively, second level air type condenser and first order air type condenser, be communicated with in side, chimney bottom and be provided with an air blast, the exhaust outlet of this air blast is communicated with the air inlet of combustor of body of heater by closing pipe line, flue gas in body of heater is discharged by body of heater, successively through two-stage energy-saving appliance, water-cooling type condenser, second level air type condenser and first order air type condenser, is finally discharged by chimney.
And, to be fixed with in outer fin panel casing, convection current fin panel casing in fin panel casing and burner hearth in body of heater between upper drum and lower drum from left to right successively, in this outer fin panel casing, convection current in fin panel casing and burner hearth fin panel casing from left to right successively interval be fixedly mounted with; Further, evenly gather and be provided with the second convection bank in outer fin panel casing and convection current between fin panel casing, evenly gathering between fin panel casing in fin panel casing and burner hearth in convection current is provided with the first convection bank; Leave smoke inlet between fin panel casing and the inwall of solid in burner hearth, in first convection bank at this smoke inlet place and burner hearth, fin panel casing arranges and forms oblique 45 °; Leave gap between fin panel casing and inboard wall of furnace body in the convection current of distance smoke inlet one end far away and form turning channel, guide and passed through finally to enter flue by the second convection bank by flue gas after half-turn.
And longitudinal separation is provided with multiple convection current sides detecting gate on the body of heater outside outside fin panel casing.
And longitudinal separation is provided with multiple burner hearth sides peephole on body of heater.
And, along number, second level air type condenser and first order air type condenser are installed from bottom to top at flue afterbody, the input of first order air type condenser is communicated with cold air inlet, one end of the output communication seals breather pipe of first order air type condenser, the other end of sealing ventilation pipe is communicated with the input of secondary air type condenser, and the output of secondary air type condenser is communicated with hot-blast outlet; Flue gas first through the heat exchange of second level air type condenser, then carries out secondary heat exchange through first order air type condenser, forms countercurrent flow.
And the heat exchanger tube of air type condenser all adopts 304 stainless steel tubes of Φ 40 × 1.5.
Advantage of the present invention and good effect are:
1, structural design of the present invention to consider Large Furnace body structure heat endurance, combustion heat aerodynamic stability, avoid furnace equipment resonance qualitly, also need to carry out body of heater thermodynamic computing, each equipment flue gas resistance calculate, Water circulation hydrodynamics calculatings in stove, tube wall temperature calculation and check, safety valve discharge the multiple types such as calculating, the research of many science and calculating, be a complicated comprehensive mathematical models.Actual measurement boiler complete machine runs output load 73.86MW, exhaust gas temperature 37.38 DEG C, efficiency reaches 108.39%, NOx monitoring reaches 60mg/Nm3, it is high-efficiency environment friendly energy-conservation, advanced technology that two tests detect this product of digital proof 70MW gas-fired water heating boiler, and indices is all better than national standard.
2, the increase of this large-sized boiler height, and SZS type gas fired-boiler upper drum does not have the support of major diameter down-comer, the nearly 30 tons of weight of upper drum are all by monowall tube with convection tube is uniform bears, through checking the stress data of every root pipe, convection tube quantity is supported by increasing, reduce vertical load suffered by single pipe, increase caliber and wall thickness (thick-walled pipe of φ 60 × 4) improve pipe strength and rigidity, support overweight upper drum and solve nose heave structural instability problem.
3, convection bank of the present invention all adopts along tubulation row structure, adopts the thick-walled pipe of φ 60 × 4, transverse pitch 200mm, longitudinal pitch 90mm.In order to prevent the vibration of pipe under airflow function, between longitudinal pipe, stage casing band steel is connected, and every comb is connected in one, greatly strengthen the rigidity of pipe.The horizontal spacing of 200mm is the wide smoke corridor for ensureing the design of lower flue gas flow rate, though decrease to pipe heat exchange efficiency, facilitates installation and maintenance repair.In addition, leave space for maintenance respectively after in before first and second convection bank district and be provided with inspection door, the service work during more convenient shutdown of boiler.Consider that boiler operatiopn initial stage stove coolant-temperature gage is low, burning load is little, will certainly produce condensed water in body of heater, therefore, in tube bank both sides, membrane wall extreme lower position is provided with hot well and delivery pipe.
4, the present invention changes in stove the structure causing the sudden change of cigarette speed, employing flue gas is at the uniform velocity turned and low speed passes through technology, avoid flue gas to be partially formed violent flow-disturbing and cause body of heater vibration problem, thin and tall pipe unstable characteristic is solved with ultralow convection current cigarette speed (11-13m/s), convection tube longitudinal short fin platoon bundling technique, strengthen roomy membrane wall rigidity with the outer large area increase stud of membrane wall and rigidity transverse and longitudinal beam and solve its thin-walled eardrum effect problem, reduce body of heater vibration.
5, the present invention obtains overall application as the film-type water-cooling wall technique that large-scale water-tube boiler generally uses in this project, all outer wall coils, stove internal partition wall pipe all realize membrane wall, manufacture difficulty increase brings the raising greatly of body of heater heat endurance, thermal-insulating sealing, simultaneously, without the design of fire-resistant furnace wall, not only body of heater weight reduces greatly, and, do not use the refractory material that high pollution highly energy-consuming is produced, indirectly improve product energy-conserving and environment-protective level.
6, the present invention adopts deep condensation formula multi-group heat exchanger structure, and it is made up of water-cooling type energy-saving appliance+water-cooling type condenser+air-cooled condenser, exhaust gas temperature can be down to about 30 DEG C, makes nearly 80% water vapour in flue gas be condensed into water, and centralized recovery utilizes.
7, present invention employs high cigarette warm area forced water circulation, the mixed type water circulation structure of low cigarette warm area natural water circulation, in the hearth region of high temperature, the hydroecium dividing plate of heat pipe by arranging in upper and lower drum in 700 DEG C of above regions of cigarette temperature, what controlled circulation water was orderly flows through each heating surface tube, make its ensure to reach national boiler hydrodynamics calculate standard recommendation safety rise and descending water fast, can ensure heat pipe safe and reliable operation and do not occur overheated; And natural water circulation mode is adopted to the low-temperature space heat-exchanging tube bundle of flue-gas temperature less than 700 DEG C, being distributed voluntarily by pipe situation of being heated is rise and decline, even if the pipe experience of this temperature province tells that current momentary freeze occurs for we, also can not produce gasification thus form incrustation scale, safe and reliable.
8, the present invention has selected upper and lower layout two high-leveled and difficult technology of super low-NOx combustor, compare separate unit burner arrangement, it makes full use of every one-inch space of large chamber design, ensure the heat radiation uniformity of each heating surface of burner hearth, flame degree of filling in burner hearth reaches optimum state, enables super low-NOx combustor better play ultralow NOx combustibility; Further, achieve double burner two machine and burn altogether and unit single fire, load range of boiler is widened further.
9, combustor external flue gas recirculating technique is adopted, the flue gas of boiler tail about 15% is withdrawn in burner, utilize in its flame and mix non-combustible flue gas and carry out the mode that retarded combustion reduces flame temperature, combustion with meagre oxygen, and reduction reaction in combustion process (combustion intermediate product HCN consumes O
2), reduce NOx further and generate, this technology has now verified that can reduce NOx generates nearly 30% on 70MW gas fired-boiler.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention;
Fig. 2 is the top view of Fig. 1;
Fig. 3 is the structure sectional view of burner hearth part;
Fig. 4 is that the A-A of Fig. 3 is to sectional view;
Fig. 5 is energy-saving appliance structural representation;
Fig. 6 is the upward view of Fig. 5;
Fig. 7 is the structural representation of water-cooling type condenser;
Fig. 8 is the structural representation of air type condenser;
Fig. 9 is the overall appearance schematic diagram of the embodiment of the present invention.
Accompanying drawing illustrates: 1 body of heater, 2 chimneys, 3 first order air type condensers, 4 second level air type condensers, 5 water-cooling type condensers, 6 two net water inlet pipes, 7 two net outlet pipes, 8 flues, 9 energy-saving appliances, 10 energy-saving appliance drip pipes, 11 boiler water blow-down pipes, 12 lower drum travel(l)ing rests, 13 burners, 14 1 net delivery ports, 15 1 net water inlets, 16 air blasts, 17 sealing ventilation pipes, 18 cold air inlets, 19 hot-blast outlets;
101 water inlet headers, 102 water outlet headers, 103 upper collecting chambers, 104 burner hearth gantry pipe fin panel casings, 105 burner hearth side peepholes, 106 lower headers, 107 body of heater drip pipes, hydroecium dividing plate in 108 lower drums, 109 lower drums, 110 second convection banks, 111 first convection banks, fin panel casing on the left of 112 burner hearths, fin panel casing in 113 convection current, 114 outer fin panel casings, hydroecium dividing plate in 115 upper drums, 116 upper drums, 117 inner flue gas of the stove entrances, 118 convection current side detecting gates;
121 rotating stands, 122 regulate push rod;
901 energy-saving appliance upper collecting chambers, 902 energy-saving appliance heat exchanger tubes, 903 energy-saving appliance fins, 904 cappings, 905 energy-saving appliance lower headers;
501 condenser heat-exchange pipes, 502 condenser fins, 503 reinforcements, 504 condenser fixed mounts.
Detailed description of the invention
Below in conjunction with accompanying drawing, also by specific embodiment, the invention will be further described, and following examples are descriptive, are not determinate, can not limit protection scope of the present invention with this.
A kind of gas-fired water heating boiler air circulation energy-saving system, comprise body of heater 1, burner 13, flue 8, chimney 2, energy-saving appliance 9, water-cooling type condenser 5, second level air type condenser 4 and first order air type condenser 3, body of heater one end is provided with, lower spaced two burners, the body of heater other end is shaped with exhanst gas outlet and is sealedly connected with flue, the outlet of flue is connected to vertical chimney, the energy-saving appliance that two-stage order is arranged is installed in the flue between body of heater and chimney, chimney is provided with water-cooling type condenser from bottom to top successively, second level air type condenser and first order air type condenser.Flue gas in body of heater is discharged by body of heater, successively through two-stage energy-saving appliance, water-cooling type condenser, second level air type condenser and first order air type condenser, finally by the discharge of chimney upper end.
For the ease of safeguarding body of heater and environment, body of heater lower end is provided with a boiler water blow-down pipe 11 and is convenient to discharge the dirt in burner hearth; The connection of body of heater lower end is provided with a body of heater drip pipe 107, for discharging the condensed water that body of heater produces; Two-stage energy-saving appliance lower end is connected with an energy-saving appliance drip pipe 10, for discharging the condensed water that energy-saving appliance produces.
For the ease of regulating body of heater angle, at interval, body of heater lower end, multiple lower drum travel(l)ing rest 12 is installed.
In order to ensure fume emission, be communicated with in side, chimney bottom and an air blast 16 is installed, gas in adjustment flue is to smoke stack emission speed, the exhaust outlet of this air blast is communicated with the air inlet of combustor of body of heater by closing pipe line, thus the flue gas of boiler tail about 15% is withdrawn in burner, utilize its flame to mix non-combustible flue gas and come retarded combustion reduction flame temperature, combustion with meagre oxygen.
Two-stage energy-saving appliance lower end is respectively by pipeline connection to a net water inlet 15, and the pipeline connection body of heater network of rivers of energy-saving appliance upper end, is finally connected to the net delivery port 14 installed body of heater upper end and is discharged; Water-cooling type condenser is connected to two net water inlet pipe 6 and two net outlet pipes 7.
The concrete structure of body of heater is depicted as see accompanying drawing 3 to 4,
Be described with direction shown in accompanying drawing 3, the main body of body of heater is a cube body structure, inboard wall of furnace body is evenly provided with one deck burner hearth gantry pipe fin panel casing 104, be provided with the lower drum 109 that a level is longitudinally arranged in side, body of heater lower end, equal interval, the horizontal both sides of this lower drum is fixed with horizontal lower header 106;
The body of heater upper end that lower drum is corresponding is provided with a upper drum 116, equal interval, the horizontal both sides of this upper drum is fixed with horizontal upper collecting chamber 103, this upper collecting chamber has into water header 101 and water outlet header 102 respectively by pipeline connection, and this water outlet header is communicated to a net delivery port 14;
To be fixed with in outer fin panel casing 114, convection current fin panel casing 112 in fin panel casing 113 and burner hearth in body of heater between upper drum and lower drum from left to right successively, in this outer fin panel casing, convection current in fin panel casing and burner hearth fin panel casing from left to right successively interval be fixedly mounted with; Further, evenly gather and be provided with the second convection bank 110 in outer fin panel casing and convection current between fin panel casing, evenly gathering between fin panel casing in fin panel casing and burner hearth in convection current is provided with the first convection bank 111;
Leave smoke inlet 117 between fin panel casing and the inwall of solid in burner hearth, in first convection bank at this smoke inlet place and burner hearth, fin panel casing arranges and forms oblique 45 °, and inclination angle buffering flue gas stablizes flow velocity; Leave gap between fin panel casing and inboard wall of furnace body in the convection current of distance smoke inlet one end far away and form turning channel, guide and passed through finally to arrive flue by the second convection bank by flue gas after half-turn;
In the present embodiment, the nearly 30 tons of weight of upper drum are all by monowall tube with convection tube is uniform bears, and supporting convection tube quantity, reducing vertical load suffered by single pipe by increasing.All membrane wall pipes and convection tube all adopt the thick-walled pipe of φ 60 × 4, not only increase the intensity of single pipe, also improve resistance to corrosion simultaneously, extend the service life of boiler entirety.Fin between membrane wall pipe adopts the band steel that 30mm is wide, 6mm is thick, and two-sided and tube welding, can strengthen intensity and the heat-resisting ability of membrane wall, reduces thermal stress to the impact of membrane wall.The use of refractory brickwork or concrete partition has been abandoned in the application of membrane wall technology thoroughly, installs easier, economical and environmental benefit is better.
Hydroecium dividing plate 115 in the upper drum arranged in upper drum, hydroecium dividing plate 108 in the lower drum arranged in lower drum, what controlled circulation water was orderly flows through each heating surface tube, make its ensure to reach national boiler hydrodynamics calculate standard recommendation safety rise and descending water speed, the safe and reliable operation of guarantee heat pipe and do not occur overheated;
On body of heater outside outside fin panel casing, longitudinal separation is provided with three convection current side detecting gates 118, and on the opposite side body of heater checking door relative with convection current side, longitudinal separation is provided with three burner hearth side peepholes 105.
In order to regulate body of heater angle, be rotatably installed on a rotating stand 121 at lower drum, body of heater lower end opposite side is provided with an adjustment push rod 122, and this adjustment push rod extension and contraction control body of heater is in the swing of certain angle.
Energy-saving appliance structural representation is Figure 6 shows that to attached see accompanying drawing 5, energy-saving appliance comprises energy-saving appliance upper collecting chamber 901, energy-saving appliance lower header 905, energy-saving appliance heat exchanger tube 902 and energy-saving appliance fin 903, on energy-saving appliance upper collecting chamber and energy-saving appliance lower header, lower spaced and parallel setting, many energy-saving appliance heat exchanger tubes 902 are communicated with uniformly at intervals between energy-saving appliance upper collecting chamber and energy-saving appliance lower header, flue gas in flue is passed through by the gap outside energy-saving appliance heat exchanger tube, water in flue gas and energy-saving appliance heat exchanger tube carries out exchange heat, energy-saving appliance heat exchanger tube adopts the S30408 stainless steel tube of the acid corrosion-resistant of φ 38 × 3, the energy-saving appliance fin 903 of S30408 stainless steel is wound around in the outer high-frequency welding of energy-saving appliance heat exchanger tube, pipe row transverse pitch 80mm, longitudinal pitch 100mm, entirety is assembled in Mei Ji energy-saving appliance factory, on-the-spot directly hoisted in position, greatly easy mounting process,
Energy-saving appliance lower header one end is communicated with a net water inlet 15, and energy-saving appliance lower header other end co-axial seal is fixed with capping 904, and energy-saving appliance upper collecting chamber is by the heat exchanger tube of pipeline connection body of heater.
The present embodiment adopts two-stage energy-saving appliance, and heating surface total amount, up to nearly square meter more than 2900, more than the heating surface total amount of boiler body, will control exit gas temperature within 80 DEG C, substantially for boiler blow-down water temperature adds 10 DEG C, improve boiler efficiency about 3.5%.
Water-cooling type condenser is Figure 7 shows that see attached, comprise condenser fixed mount 504, condenser heat-exchange pipes 501, condenser fin 502, two net water inlet pipe 6 and two net outlet pipes 7, condenser fixed mount is the rectangular frame that a horizontal cross is arranged, on the right side of condenser fixed mount, upper end is fixed with two net outlet pipes, on the right side of fixed mount, lower end is fixed with two net water inlet pipes, the many snakelike condenser heat-exchange pipes along row arrangement are fixed with in condenser fixed mount upper end, the two ends of condenser heat-exchange pipes are communicated with two net water inlet pipes and two net outlet pipes respectively, water (flow) direction in condenser heat-exchange pipes is contrary with flue gas flow direction forms countercurrent flow, adopt four heat exchanger tubes arranged uniformly at intervals shown in the present embodiment, heat exchanger tube carries out five half-turns.In order to increase the heat exchange area of heat exchanger tube further, the condenser heat-exchange pipes high-frequency welding be positioned in the middle part of fixed mount is wound around the condenser fin of S30408 stainless steel, this city embodiment adopts the version of horizontal tube vertical fin to be more conducive to condensed water, flue dust and rust sheet to wash away and come off, keep the clean of heat-transfer surface, have employed countercurrent flow level snakelike along row comb form.Condenser heat-exchange pipes material still adopts S30408 stainless steel, and the heating surface total amount of single-stage condenser is up to square meter more than 3360, and controlled exit gas temperature processed, within 40 DEG C, is that two net return water temperatures add 5-8 DEG C substantially, improves boiler efficiency nearly 8.2%.
In order to ensure structural strength, between condenser heat-exchange pipes, be fixed with the reinforcement 503 that many transverse and longitudinals are staggered.
Shown in accompanying drawing 8, consider the raising of net return water temperature dead season two, air-cooled condenser has better booster action, arrange two-stage large-scale air cooling device, be specially: on chimney, along number, second level air type condenser 4 and first order air type condenser 3 are installed from bottom to top, the input of first order air type condenser is communicated with cold air inlet 18, one end of the output communication seals breather pipe 17 of first order air type condenser, the other end of sealing ventilation pipe is communicated with the input of secondary air type condenser, and the output of secondary air type condenser is communicated with hot-blast outlet 19; Flue gas is first through the heat exchange of second level air type condenser, secondary heat exchange is carried out again through first order air type condenser, form countercurrent flow form, exhaust gas temperature 5-9 DEG C can be reduced effectively again, improve boiler efficiency nearly 1.3%, can be the hot blast of about 20 DEG C simultaneously by cold air heating, be conducive to the control of burning and NOx.Consider air cooler light-wall pipe acid-resistant corrosion, the heat exchanger tube of air type condenser all adopts 304 stainless steel tubes of Φ 40 × 1.5, and two ends tube sheet adopts the thick ND steel plate of 16mm, and Intermediate Gray anti-swirl pot, Type of Welding overall package, outer casing is the thick ND steel plate of 6mm.
Condensed water pH value is up to 3.7-4.2 and holds faintly acid, for reducing the corrosion to condenser tube, and application 06Cr19Ni10 (S30408 stainless steel) finned tube material.For extending the service life of energy-saving appliance and condenser heating surface, tubing and fin all adopt stainless steel material.Meanwhile, the shell steel plate of energy-saving appliance and connection flue etc. also adopt ND steel plate to make with the nonpressure parts that condensed water directly contacts, and improve energy-saving appliance whole service life to reduce costs.
Although disclose embodiments of the invention and accompanying drawing for the purpose of illustration, but it will be appreciated by those skilled in the art that: in the spirit and scope not departing from the present invention and claims, various replacement, change and amendment are all possible, therefore, scope of the present invention is not limited to the content disclosed in embodiment and accompanying drawing.
Claims (6)
1. a gas-fired water heating boiler air circulation energy-saving system, it is characterized in that: comprise body of heater, burner, flue, chimney, energy-saving appliance, water-cooling type condenser, second level air type condenser and first order air type condenser, body of heater one end is provided with, lower spaced two burners, the body of heater other end is shaped with exhanst gas outlet and is sealedly connected with flue, the outlet of flue is connected to vertical chimney, the energy-saving appliance that two-stage order is arranged is installed in the flue between body of heater and chimney, chimney is provided with water-cooling type condenser from bottom to top successively, second level air type condenser and first order air type condenser,
Be communicated with in side, chimney bottom and be provided with an air blast, the exhaust outlet of this air blast is communicated with the air inlet of combustor of body of heater by closing pipe line;
Flue gas in body of heater is discharged by body of heater, successively through two-stage energy-saving appliance, water-cooling type condenser, second level air type condenser and first order air type condenser, is finally discharged by chimney.
2. gas-fired water heating boiler air circulation energy-saving system according to claim 1, it is characterized in that: in the body of heater between upper drum and lower drum, to be fixed with in outer fin panel casing, convection current fin panel casing in fin panel casing and burner hearth from left to right successively, in this outer fin panel casing, convection current in fin panel casing and burner hearth fin panel casing from left to right successively interval be fixedly mounted with; Further, evenly gather and be provided with the second convection bank in outer fin panel casing and convection current between fin panel casing, evenly gathering between fin panel casing in fin panel casing and burner hearth in convection current is provided with the first convection bank; Leave smoke inlet between fin panel casing and the inwall of solid in burner hearth, in first convection bank at this smoke inlet place and burner hearth, fin panel casing arranges and forms oblique 45 °; Leave gap between fin panel casing and inboard wall of furnace body in the convection current of distance smoke inlet one end far away and form turning channel, guide and passed through finally to enter flue by the second convection bank by flue gas after half-turn.
3. gas-fired water heating boiler air circulation energy-saving system according to claim 2, is characterized in that: on the body of heater outside outside fin panel casing, longitudinal separation is provided with multiple convection current sides detecting gate.
4. gas-fired water heating boiler air circulation energy-saving system according to claim 2, is characterized in that: on body of heater, longitudinal separation is provided with multiple burner hearth sides peephole.
5. gas-fired water heating boiler air circulation energy-saving system according to claim 1, it is characterized in that: along number, second level air type condenser and first order air type condenser are installed from bottom to top at flue afterbody, the input of first order air type condenser is communicated with cold air inlet, one end of the output communication seals breather pipe of first order air type condenser, the other end of sealing ventilation pipe is communicated with the input of secondary air type condenser, and the output of secondary air type condenser is communicated with hot-blast outlet; Flue gas first through the heat exchange of second level air type condenser, then carries out secondary heat exchange through first order air type condenser, forms countercurrent flow.
6. gas-fired water heating boiler air circulation energy-saving system according to claim 5, is characterized in that: the heat exchanger tube of air type condenser all adopts 304 stainless steel tubes of Φ 40 × 1.5.
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| CN201510853939.7A CN105299894B (en) | 2015-11-30 | 2015-11-30 | A kind of gas-fired water heating boiler air circulation energy conserving system |
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| CN201510853939.7A CN105299894B (en) | 2015-11-30 | 2015-11-30 | A kind of gas-fired water heating boiler air circulation energy conserving system |
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| CN105299894A true CN105299894A (en) | 2016-02-03 |
| CN105299894B CN105299894B (en) | 2018-12-04 |
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| CN201510853939.7A Active CN105299894B (en) | 2015-11-30 | 2015-11-30 | A kind of gas-fired water heating boiler air circulation energy conserving system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105627563A (en) * | 2016-03-16 | 2016-06-01 | 高诗白 | Heating equipment of condensation type gas-fired boiler with multiple annular cavities |
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| CN205156347U (en) * | 2015-11-30 | 2016-04-13 | 天津宝成机械制造股份有限公司 | Gas -fired hot water boiler air cycle economizer system |
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| GB2087523B (en) * | 1980-11-14 | 1984-07-18 | Foster Wheeler Power Prod | Modular package boiler |
| CN201539965U (en) * | 2009-11-18 | 2010-08-04 | 天津大滩锅炉集团有限公司 | Hot water boiler with sectionalized arranged air pre-heaters |
| CN202547095U (en) * | 2012-05-03 | 2012-11-21 | 西安交通大学 | Water circulation structure of post-positioned boiler drum auxiliary forced circulation angular tube |
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| CN103363658A (en) * | 2013-07-19 | 2013-10-23 | 天津宝成机械制造股份有限公司 | Large double-barrel vertical gas boiler |
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| CN105627563A (en) * | 2016-03-16 | 2016-06-01 | 高诗白 | Heating equipment of condensation type gas-fired boiler with multiple annular cavities |
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| CN105299894B (en) | 2018-12-04 |
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