CN105004052A - Water tube type vacuum boiler with central reverse flames - Google Patents

Water tube type vacuum boiler with central reverse flames Download PDF

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Publication number
CN105004052A
CN105004052A CN201510517697.4A CN201510517697A CN105004052A CN 105004052 A CN105004052 A CN 105004052A CN 201510517697 A CN201510517697 A CN 201510517697A CN 105004052 A CN105004052 A CN 105004052A
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CN
China
Prior art keywords
heat exchanger
boiler
tube
flue
smoke
Prior art date
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Pending
Application number
CN201510517697.4A
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Chinese (zh)
Inventor
吴金星
倪硕
杨禹坤
彭旭
栗俊芬
刘艳会
王明强
王超
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Zhengzhou University
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Zhengzhou University
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Application filed by Zhengzhou University filed Critical Zhengzhou University
Priority to CN201510517697.4A priority Critical patent/CN105004052A/en
Publication of CN105004052A publication Critical patent/CN105004052A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a water tube type vacuum boiler with central reverse flames. The vacuum boiler mainly comprises a combustor, a casing, a flue gas transfer chamber, a container, a water tube type heat exchanger and a U-shaped tube heat exchanger. The vacuum boiler is characterized in that the boiler casing is formed by butt-jointing an upper arc-shaped barrel and a lower cuboid casing, the U-shaped tube heat exchanger is located at the upper part of the casing, and the container, the flue gas transfer chamber and the water tube type heat exchanger are located at the lower part of the casing; the container is waved, the front end of the container is welded on the flue gas transfer chamber, and the back end is welded on an ellipsoidal gland; a central reverse flame combustion manner is adopted; a plurality of vertical heat exchange tubes are arranged in the water tube type heat exchanger, flue gas inlets of the heat exchange tubes are welded on the flue gas transfer chamber, and flue gas outlets are connected with an exhaust tube. The boiler keeps a certain vacuum degree inside during running, boiler water boils at the temperature lower than 100 DEG C after being heated, steam rises and condenses outside the U-shaped tube heat exchanger to release heat to heat return water in the tube, and condensate water flows back into the boiler. The boiler is compact in structure and higher in heat efficiency and occupies small area, and no external heat exchanger is required.

Description

Waterpipe type central flame flame vacuum boiler
Technical field
The present invention relates to combustion gas vacuum boiler field, particularly relate to one waterpipe type central flame flame vacuum boiler safely and efficiently.
Background technology
Coal-burning boiler is applied in the every field in life and industry, as school, hospital, hotel etc., it belongs to, and power consumption is high, the thermal efficiency is low, with serious pollution a kind of equipment, the primary pollution source causing haze weather, have a strong impact on the healthy of people, greatly constrain the development of national economy.And gas fired-boiler is simple and compact for structure, the thermal efficiency is higher, less pollution, it is the ideal product of alternative coal-burning boiler.Combustion gas vacuum boiler belongs to national freed-from-inspection product, its operation principle is, boiler internal keeps certain vacuum, when seething with excitement lower than when 100 DEG C after stove water is heated, after steam runs into the heat exchanger of upper boiler, heat is released in condensation, and backwater in heating tube, hot water flows out from outlet pipe, get back in stove water after steam-condensation, form the cyclic process of stove water.Combustion gas vacuum boiler advantage safe with it, efficient, simple to operate becomes the object that each manufacturer competitively researches and develops, but history is shorter, design experiences is not enough, still there is many technical problems at present because combustion gas vacuum boiler uses.
Vacuum boiler major part is in the market horizontal three-pass boiler, and boiler has forward and backward smoke box, and flue gas is after flue, and enter parallel baffled smoke pipe in two, three backhaul smoke pipes, heat exchange efficiency is lower.Existing central flame flame boiler turns smoke-box and is generally dry back structure, and during boiler operatiopn, front tube sheet temperature is higher, and not only radiation loss is comparatively large, and to turning the heat-resisting of smoke-box and sealing property requires higher.High-temperature flue gas directly contacts with weld seam, and commissure is easily cracked.
In sum, there is the deficiencies such as efficiency of combustion is low, tube sheet is easy to crack, structure is not tightly urged, floor space is large in currently marketed vacuum boiler.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides the waterpipe type central flame flame vacuum boiler that a kind of efficiency of combustion is high, compact conformation, floor space are little, fuel can adopt natural gas, town gas, liquefied petroleum gas, heavy oil, light oil etc.
The technical solution adopted in the present invention is: waterpipe type central flame flame vacuum boiler comprises burner, housing, turns smoke-box, return pipe, outlet pipe, flue, waterpipe type heat exchanger, smoke exhaust pipe, U-shaped heat exchanger, pressure vacuum gauge, venting ball valve, stove water inlet pipe, furnace staying, blow-off pipe and discharging tube, it is characterized in that: boiler shell is docked by the circular arc type cylindrical shell on top and the cuboid shell of bottom and forms, U-tube heat exchanger is positioned at housing upper, flue, turns smoke-box and waterpipe type heat exchanger is positioned at lower housing portion; Flue is waveform, and its front end is welded in and turns smoke-box, rear end welding ellipsoidal head; Strile-back type centered by combustion system; Arrange multiple vertical heat exchanger tube in waterpipe type heat exchanger, its gas approach is welded in and turns smoke-box, and exhanst gas outlet connects smoke exhaust pipe.Flue, turn smoke-box and waterpipe type heat exchanger is all immersed in stove water, form complete wet back structure.
Described waterpipe type heat exchanger is positioned at above flue, and docked by four pieces of slab normal and be welded, both ends of the surface are as smoke entrance; Its upper and lower panel is as tube sheet, and heat exchanger tube is vertically fixed on tube sheet by welding, and heat exchanger tube is arranged by the wrong row's mode of equilateral triangle on tube sheet, and heat exchanger tube can adopt plain tube or finned tube.
Described flue is the next major diameter flue, strile-back type centered by its internal-combustion mode, flue and turn smoke-box link into an integrated entity composition combustion space.
Described U-tube heat exchanger piping mode is wrong row, and return pipe is in downside, and outlet pipe is in upside.
Described boiler shell is provided with safety valve and liquid level gauge, bottom boiler shell, is provided with blow-off pipe and condensate discharge pipe, below boiler shell, is provided with bearing.
Described boiler is provided with control system, and described control system configures perfect device for automatically controlling and safety guard.
Compared with prior art, the invention has the beneficial effects as follows: 1. waterpipe type heat exchanger internal vertical is staggered in arrangement multiple heat exchanger tube, the heat exchanger tube of flue gas transversal flow waterpipe type heat exchanger, has larger convection transfer rate, reach the object of enhanced heat exchange, improve boiler efficiency; 2. the weld seam of the exchanger tubes and tubesheets of waterpipe type heat exchanger is all immersed in water, avoids weld seam directly to contact with thermal-flame, can prevent the tube sheet of position while welding from cracking because of thermal-flame; 3. central flame flame combustion system adds the Radiant exothermicity of flue, and the convection heating surface that can reduce back-end ductwork amasss, and simplifies boiler structure, reduces boiler volume, thus reduces floor space, reduction cost of manufacture; 4. boiler internal keeps certain vacuum degree, and stove water can seethe with excitement in lower than 100 DEG C, reduces energy consumption; 5. vacuum boiler work is in negative pressure state, there is not explosion issues, and security is high; 6. wet back structure can either reduce body of heater surface temperature, reduces heat loss, again can the prolonged boiler normal cycle of operation; 7. ellipsoidal head can make thermal-flame without dead angle in turning course, reduces the loss of momentum; 8. the situation that the next flue arrangement can prevent stove water liquid level from splashing occurs, and reduces energy loss; The equilateral triangle piping mode of 9.U type heat exchange of heat pipe can make steam and the abundant heat exchange of heat exchanger tube, heats backwater with the latent heat that steam is released.
Accompanying drawing explanation
Fig. 1 is waterpipe type central flame flame vacuum boiler front view;
Fig. 2 is waterpipe type central flame flame vacuum boiler A-A profile;
Fig. 3 is waterpipe type heat exchanger schematic three dimensional views.
Reference numeral: 1-burner; 2-housing; 3-turns smoke-box; 4-return pipe; 5-outlet pipe; 6-U shape heat exchange of heat pipe; 7-stove water inlet pipe; 8-venting ball valve; 9-pressure vacuum gauge; 10-waterpipe type heat exchanger; 11-smoke exhaust pipe; 12-discharging tube; 13-furnace staying; 14-flue; 15-blow-off pipe.
Detailed description of the invention
The detailed description of the invention of waterpipe type central flame flame vacuum boiler is further illustrated below in conjunction with accompanying drawing.
The manufacture craft of waterpipe type central flame flame vacuum boiler: first make and turn smoke-box, ellipsoidal head is welded on flue one end, then by the flue other end with turn smoke-box and weld together, flue is fixed on housing by stay bolt; Waterpipe type heat exchanger is docked by four pieces of slab normal and is welded, and both ends of the surface are as smoke entrance, and one end connection turns smoke-box, and the other end connects smoke exhaust pipe; The upper and lower panel of waterpipe type heat exchanger is as tube sheet, and multiple heat exchanger tube is vertically fixed on tube sheet by welding, and heat exchanger tube is arranged according to staggered triangular pitch mode on tube sheet; U-tube heat exchanger is welded on tube sheet by some single u-shaped pipes and forms, and U-tube heat exchanger is fixed on housing upper, and the water inlet pipe and water outlet pipe of U-tube heat exchanger adopts Flange joint.Finally the parts such as stove water inlet pipe, pressure vacuum gauge, venting ball valve, liquid level gauge, hanger, discharging tube, blow-off pipe and burner are installed in housing relevant position.
The course of work of waterpipe type central flame flame vacuum boiler is further illustrated below in conjunction with accompanying drawing.
Preparatory stage: add through water that is softening, deoxygenation process to enclosure interior by stove water inlet pipe, by liquid level gauge observation boiler internal water level, when above water level arrives waterpipe type heat exchanger during certain depth, stop adding water.
Combustion process: natural gas and air are by burner mixed combustion, and flame is spouting from burner nozzle, turn back after arriving ellipsoidal head, flow into from corrugated flue and turn smoke-box, then enter waterpipe type heat exchanger, the heat exchanger tube of transversal flow waterpipe type heat exchanger, discharges from smoke exhaust pipe.
Heating process: first close venting ball valve, start burner, the stove water of boiler is heated, first the following stove water of enclosure interior be subject to the heating of flue, waterpipe type heat exchanger is risen to by free convection after stove water is heated, rising of being heated is continued in the pipe that stove water enters waterpipe type heat exchanger, stove water comes to life after being heated and reaching uniform temperature, as pressure vacuum gauge display+0.05MPa, open the venting ball valve above housing, discharge furnace air and a small amount of steam, then venting ball valve is closed, open the return pipe of U-tube heat exchanger, the operational mode of boiler changes automatic mode into.The tube bank external condensation of steam U-shaped heat exchanger on top, make to produce certain vacuum in stove, stove water is when seething with excitement lower than when 100 DEG C, steam-condensation releases a large amount of gasification latent heats to heat the backwater in U-tube, hot water is discharged from outlet pipe, and the condensed water formed after steam condensation falls back in stove.Stove water in boiler internal circulation, can not increase and decrease always, and negative pressure is run, so stove internal heating surface non flouling behaviour, boiler does not have the danger of blast yet.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (4)

1. the invention discloses a kind of waterpipe type central flame flame vacuum boiler, comprise burner, housing, turn smoke-box, return pipe, outlet pipe, flue, waterpipe type heat exchanger, smoke exhaust pipe, U-shaped heat exchanger, pressure vacuum gauge, venting ball valve, stove water inlet pipe, furnace staying, blow-off pipe and discharging tube, it is characterized in that: boiler shell is docked by the circular arc cylindrical shell on top and the cuboid shell of bottom and forms, U-tube heat exchanger is positioned at housing upper, flue, turns smoke-box and waterpipe type heat exchanger is positioned at lower housing portion; Flue is waveform, and its front end is welded in and turns smoke-box, rear end welding ellipsoidal head; Strile-back type centered by combustion system; Arrange multiple vertical heat exchanger tube in waterpipe type heat exchanger, its gas approach is welded in and turns smoke-box, and exhanst gas outlet connects smoke exhaust pipe; Flue, turn smoke-box and waterpipe type heat exchanger is all immersed in stove water, form complete wet back structure.
2. waterpipe type central flame flame vacuum boiler according to claim 1, it is characterized in that: described waterpipe type heat exchanger is positioned at above flue, docked by four pieces of slab normal and be welded, both ends of the surface are as smoke entrance; Its upper and lower panel is as tube sheet, and heat exchanger tube is vertically fixed on tube sheet by welding, and heat exchanger tube is arranged by the wrong row's mode of equilateral triangle on tube sheet, and heat exchanger tube can adopt plain tube or finned tube.
3. waterpipe type central flame flame vacuum boiler according to claim 1, is characterized in that: described flue is the next major diameter flue, strile-back type centered by its internal-combustion mode, flue and turn smoke-box link into an integrated entity composition combustion space.
4. waterpipe type central flame flame vacuum boiler according to claim 1, is characterized in that: described U-tube heat exchanger piping mode is wrong row, and return pipe is in downside, and outlet pipe is in upside.
CN201510517697.4A 2015-08-22 2015-08-22 Water tube type vacuum boiler with central reverse flames Pending CN105004052A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106123344A (en) * 2016-07-13 2016-11-16 杭州富尔顿热能设备有限公司 A kind of vacuum boiler and to the method for vacuum boiler vacuum pumping, Apparatus and system
CN107965750A (en) * 2017-11-28 2018-04-27 崔秀萍 A kind of steam-heating system and its method
CN108019941A (en) * 2017-11-28 2018-05-11 崔秀萍 A kind of heat medium water vacuum boiler and its method

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CN107965750A (en) * 2017-11-28 2018-04-27 崔秀萍 A kind of steam-heating system and its method
CN108019941A (en) * 2017-11-28 2018-05-11 崔秀萍 A kind of heat medium water vacuum boiler and its method
CN107965750B (en) * 2017-11-28 2019-05-17 临沂兴源热力有限公司 A kind of steam-heating system and its method

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