CN104806994A - Film type smoke isolation wall threaded pipe convection pipe bundle longitudinal heat exchange water pipe boiler - Google Patents

Abstract

The invention relates to a film type smoke isolation wall threaded pipe convection pipe bundle longitudinal heat exchange water pipe boiler, comprising a boiler body (7), wherein each convection pipe bundle smoke isolation wall (8) is a film type wall flow guide wall, a convection pipe bundle (4) is formed by a plurality of threaded pipes, the boiler body (7) is also provided with a threaded pipe air preheater and threaded smoke pipe coal economizer combined device (9) and a cyclone dust collector (10), and a smoke inlet of the combined device (9) is communicated with the smoke outlet of the boiler body (7), and the smoke inlet of the cyclone dust collector (10) is communicated with the smoke outlet of the combination device (9). The film type smoke isolation wall threaded pipe convection pipe bundle longitudinal heat exchange water pipe boiler has the advantages of less equipment investment, good energy saving property, high heat exchange, and capability of saving fuel and energy. The smoke isolation wall is made of a film wall smoke isolation wall instead of a refractory material, so the airtightness and energy saving effect of the boiler are improved; the longitudinal heat exchange effect of a boiler convection pipe is enhanced by the convection pipe bundle made of the threaded pipes, so the boiler saves more fuel and the energy saving and consumption reduction are realized.

Description

The longitudinal heat exchange type water-tube boiler of membrane wall brick baffle screwed pipe convection bank

Technical field

The present invention relates to heating equipment, be specifically related to the longitudinal heat exchange type water-tube boiler of a kind of convection bank.

Background technology

The sidewall of the longitudinal heat exchange type water-tube boiler of common convection bank is made up of bare-tube wall pipe and the refractory wall be positioned at outside water screen tube, the weight and volume of boiler is relatively large, the consumption of refractory material is also more, equipment investment is larger, the sealing of the furnace wall that refractory material is made is good not, easily crack, air leakage coefficient cause greatly the heat in burner hearth meaningless scatter and disappear, have influence on the energy saving of boiler.Occurred that membrane wall furnace wall efficiently solved this problem afterwards, but the brick baffle making flue gas turn back up and down in this boiler remains and is formed by laying fireproof bricks, the gap of convection bank is smaller, workmen cannot enter and build by laying bricks or stones, by instrument, refractory brick can only be pushed away to the inside one by one, build by laying bricks or stones very inconvenient, speed of application is also slow, not only waste of manpower but also be difficult to ensure the quality of products.The poor sealing of the brick baffle of laying fireproof bricks, easily causes flue gas short circuit, wastes the heating surface of boiler.Reduce although the flue gas in this boiler washes away the resistance that flue gas can be made to be subject to along the following current of convection bank axis vertical, to make in convection bank not easily dust stratification, but due to the smooth surface of convection bank, the coefficient of heat transfer between convection bank with flue gas is relative also lower, the efficiency wanting to reach boiler just needs the quantity increasing convection tube, can increase steel quantity consumption.Because heat exchange efficiency is lower, boiler discharge flue-gas temperature also higher, cause boiler not fuel saving, waste energy.

Summary of the invention

The object of this invention is to provide a kind of equipment investment few, good energy saving property, heat exchange efficiency is high, the longitudinal heat exchange type water-tube boiler of membrane wall brick baffle screwed pipe convection bank of fuel saving and the energy.

Technical solution of the present invention is: it comprises and includes monowall tube, upper drum, lower drum, longitudinal convection bank, convection bank longitudinal heat exchange type water-tube boiler body of heater of coal bunker and fire grate, the burner hearth of boiler furnace and the furnace wall of secondary furnace are the closed furnace wall be made up of pattern water screen tube respectively, longitudinally to be located at each convection bank brick baffle of convection bank position between upper drum and lower drum be by many convection tubes respectively and be welded on the membrane wall training wall that the steel plate between adjacent convection tube forms, the screwed pipe that convection bank is connected with lower drum with upper drum respectively by about many two ends is formed, boiler furnace is also provided with thread pipe air preheater and threaded flue economizer combination unit and cyclone dust collectors, thread pipe air preheater is connected with the exhanst gas outlet of boiler furnace with the smoke inlet of threaded flue economizer combination unit, cool air inlet is connected with the outer air of boiler furnace, hot air outlet is connected with the boiler furnace air compartment below fire grate by air blast, water inlet is connected with the water return pipeline that supplies of boiler furnace respectively by pipeline with delivery port, the smoke inlet of cyclone dust collectors is connected with the exhanst gas outlet of thread pipe air preheater with threaded flue economizer combination unit, the exhanst gas outlet of cyclone dust collectors is connected by the outer dust arrester installation of pipeline and boiler furnace.

Technique effect of the present invention is: it is few that it has equipment investment, good energy saving property, and heat exchange efficiency is high, the advantage of fuel saving and the energy.The brick baffle that heat convection structure adopts membrane wall brick baffle replacement refractory material to make, can make each convection current cigarette journey better tightness of boiler, and solve the difficult problem of building by laying bricks or stones of refractory brick, can improve sealing and the energy-saving effect of boiler.The convection bank that screwed pipe is made adds the longitudinal heat transfer effect of boiler convection tube, and the heat exchange efficiency of boiler can be made greatly to improve, make boiler fuel saving more, the flue-gas temperature of discharge also can decline, and realizes energy-saving and cost-reducing.Flue gas washes away the resistance that can reduce flue gas and be subject to along convection bank following current, convection heating surface not easily ties ash, reduces the operating cost of the frequent deashing of boiler.The flue gas of boiler tail is lowered the temperature and cyclone dust collectors dedusting through thread pipe air preheater and threaded flue economizer combination unit, flue-gas temperature and dust content all significantly reduce, more easily realize the environmental requirement of qualified discharge after other dust arrester installation dedusting.The overall weight of this boiler has and significantly alleviates, and cost is lower, is suitable for extensive promotion and application.

Accompanying drawing explanation

Fig. 1 is perspective structure figure of the present invention.

Detailed description of the invention

As shown in Figure 1, it comprises and includes monowall tube 1, upper drum 2, lower drum 3, longitudinal convection bank 4, convection bank longitudinal heat exchange type water-tube boiler body of heater 7 of coal bunker 5 and fire grate 6, the burner hearth 71 of boiler furnace 7 and the furnace wall of secondary furnace 73 are the closed furnace wall be made up of pattern water screen tube 1 respectively, longitudinally to be located at each convection bank brick baffle 8 of convection bank 4 position between upper drum 2 and lower drum 3 be by many convection tubes 41 respectively and be welded on the membrane wall training wall that the steel plate between adjacent convection tube 41 forms, the screwed pipe that convection bank 4 is connected with lower drum 3 with upper drum 2 respectively by about many two ends is formed, boiler furnace 7 is also provided with thread pipe air preheater and threaded flue economizer combination unit 9 and cyclone dust collectors 10, thread pipe air preheater is connected with the exhanst gas outlet of boiler furnace 7 with the smoke inlet of threaded flue economizer combination unit 9, cool air inlet is connected with the outer air of boiler furnace 7, hot air outlet is connected with boiler furnace 7 air compartment below fire grate 6 by air blast, water inlet is connected with the water return pipeline that supplies of boiler furnace 7 respectively by pipeline with delivery port, the smoke inlet of cyclone dust collectors 10 is connected with the exhanst gas outlet of thread pipe air preheater with threaded flue economizer combination unit 9, the exhanst gas outlet of cyclone dust collectors 10 is connected with the outer dust arrester installation of boiler furnace 7 by pipeline.

Fire grate 6 is reciprocal grate or traveling-grate stoker.

Thread pipe air preheater and threaded flue economizer combination unit 9 are applied for and " air suction type thread pipe air preheater and the threaded flue economizer combination unit " of obtaining the authorization for inventor.Thread pipe air preheater and threaded flue economizer combination unit 9 include housing, economizer and air preheater, economizer and air preheater are arranged on smoke inlet side and exhanst gas outlet side in housing exhaust gases passes respectively, economizer is by being provided with the airtight water tank housing of water inlet and delivery port and being positioned at tank shell to run through tank shell many screwed pipes along flow of flue gas direction and forming, and air preheater is by along to be located at perpendicular to flow of flue gas direction between housing offside sidewall and the many screwed pipes running through housing sidewall are formed.

Fuel burns the flue gas that produces through the membrane wall convection bank partition wall 8 of burner hearth 71 by convection bank 4 position on fire grate 6, eventually passes thread pipe air preheater and threaded flue economizer combination unit 9 and discharges with cyclone dust collectors 10 and be connected with the dust arrester installation outside body of heater.The membrane wall furnace wall of burner hearth 71 and secondary furnace 72 improves the sealing of furnace wall, makes body of heater air-tightness better, prevents cold air from entering in stove by furnace wall, reduce Air Leakage Into Boilers coefficient.Membrane wall convection bank partition wall enhances the air-tightness of convection bank partition wall, overcomes the flue gas short circuit of convection heating surface, to the sealing water conservancy diversion better effects if of flue gas.Membrane wall furnace wall and membrane wall convection bank partition wall 8 decrease the application of boiler refractory product, make the weight of boiler, volume had relative minimizing, save equipment investment.The convection bank heat exchange efficiency making screwed pipe increases, and plays the effect of making up, ensure that the heat exchange efficiency of boiler, reduce steel consumption the shortcoming that following current washes away the mode coefficient of heat transfer low.Following current is washed away and can be reduced flue gas resistance, effectively prevents collecting ash, reduces boiler operatiopn cost and accident rate, improves the stability of boiler operatiopn.Flue gas in boiler is through rising, declining heat exchange and the sedimentation of repeatedly turning back, and temperature and the dust content of flue gas reduce gradually, more meet environmental requirement, and the combustion air passing into air compartment becomes hot blast through air preheater, fuel are played to the effect promoting burning.Be installed at the cyclone dust collector 10 of boiler tail heat transfer zone, Appropriate application furnace inner space, effectively reduces the original dust exhausting concentration of boiler, reduces and decrease input and the occupation of land of later stage cleaner, saves boiler room investment.

Claims (4)

1. the longitudinal heat exchange type water-tube boiler of membrane wall brick baffle screwed pipe convection bank, it comprises and includes monowall tube (1), upper drum (2), lower drum (3), longitudinal convection bank (4), longitudinal heat exchange type water-tube boiler body of heater (7) of convection bank of coal bunker (5) and fire grate (6), the burner hearth (71) of boiler furnace (7) and the furnace wall of secondary furnace (73) are the closed furnace wall be made up of pattern water screen tube (1) respectively, it is characterized in that: to be longitudinally located at each convection bank brick baffle (8) of convection bank (4) position between upper drum (2) and lower drum (3) be by many convection tubes (41) respectively and be welded on the membrane wall training wall that the steel plate between adjacent convection tube (41) forms, the screwed pipe that convection bank (4) is connected with lower drum (3) with upper drum (2) respectively by about many two ends is formed, boiler furnace (7) is also provided with thread pipe air preheater and threaded flue economizer combination unit (9) and cyclone dust collectors (10), thread pipe air preheater is connected with the exhanst gas outlet of boiler furnace (7) with the smoke inlet of threaded flue economizer combination unit (9), cool air inlet is connected with boiler furnace (7) outer air, hot air outlet is connected by boiler furnace (7) air compartment of air blast with fire grate (6) below, water inlet is connected with the water return pipeline that supplies of boiler furnace (7) respectively by pipeline with delivery port, the smoke inlet of cyclone dust collectors (10) is connected with the exhanst gas outlet of thread pipe air preheater with threaded flue economizer combination unit (9), the exhanst gas outlet of cyclone dust collectors (10) is connected with boiler furnace (7) outer dust arrester installation by pipeline.

2. the longitudinal heat exchange type water-tube boiler of membrane wall brick baffle screwed pipe convection bank as claimed in claim 1, is characterized in that described fire grate (6) is reciprocal grate.

3. the longitudinal heat exchange type water-tube boiler of membrane wall brick baffle screwed pipe convection bank as claimed in claim 1, is characterized in that described fire grate (6) is traveling-grate stoker.

4. the longitudinal heat exchange type water-tube boiler of membrane wall brick baffle screwed pipe convection bank as claimed in claim 1, it is characterized in that described thread pipe air preheater and threaded flue economizer combination unit (9) include housing, economizer and air preheater, economizer and air preheater are arranged on smoke inlet side and exhanst gas outlet side in housing exhaust gases passes respectively, economizer is by being provided with the airtight water tank housing of water inlet and delivery port and being positioned at tank shell to run through tank shell many screwed pipes along flow of flue gas direction and forming, air preheater is by along to be located between housing offside sidewall perpendicular to flow of flue gas direction and the many screwed pipes running through housing sidewall are formed.