CN2628876Y - Water coal slurry hot water boiler - Google Patents

Abstract

A new water-coal-slurry hot-water boiler includes a non-drum boiler body, a radiating burner, a contraflow cooler, a first-rate and a second-rate air preheaters connected in series, a support, an insulating course, a metal covering. Wherein the no-drum boiler body consists of a collecting box, a downcomer, a water screen tube and a serpentuator; the radiating burner and the contraflow cooler are composed of a funnel-shaped hearth with a fixed fire-grate a flame-spinning wall, a flame-diverting wall, and a sealing and fireresisting wall. The utility model is characterized in that the radiating burner and the contraflow cooler form a door shaped structure which is similar with a utility boiler. The funnel-shaped hearth with the fixed fire-grate and the special geometrical shape radiating burner make sure of timely flammation and smooth combustion for the water-coal-slurry, and provide the condition for making the flame in the radiating burner more suffused as well as high efficiency of the heat diffusion. The utility model has the advantages of high running efficiency, low construction investment, and low running expense; the discharging of the utility model is easy to reach the standard.

Description

Novel water-coal-slurry hot-water boiler

Technical field

It is the QXS formula water pipe hot-water boiler of fuel that the utility model belongs to water-coal-slurry or coal dust, specifically is a kind of water-coal-slurry hot-water boiler of industrial ∏ type structure.

Background technology

The burning radiation chamber of existing water-coal-slurry small-sized industrial boiler and the relatively independent setting of hot-water boiler, the contact area of flame and boiler is little, and the time is short, so the thermal efficiency is lower; The torch air does not have preheating, influences that water-coal-slurry is caught fire, smooth combustion and ignition temperature.

Summary of the invention

The purpose of this utility model just provides a kind of coal water slurry boiler of industrial ∏ type structure of suitable coal water slurry fuel, so that coal water slurry fuel can in time catch fire in boiler reliably, fully burn steadily, efficient heat transfer, qualified discharge; Also can make the construction investment of coal water slurry boiler be no more than the oil burning boiler of same specification, operating cost is no more than 1/2 of same specification oil burning boiler.

In order to achieve the above object, the technical solution of the utility model is: comprise a pot body, burning radiation chamber, revolve the flame wall, foldede flame wall, the fire-resistant body of wall of sealing, heat-insulation layer, mental package skin form, described burning radiation chamber is provided with awl bucket shape furnace bottom, being provided with a fixed grate in the middle, is grey chamber below fixed grate; Side in the burning radiation chamber is provided with the convection current cooling chamber, and the flame of revolving wall is arranged at bottom between the two, and the foldede flame wall of it and top is connected as a single entity, and leaves passage above foldede flame wall, and this passage makes burning radiation chamber and convection current cooling chamber form the structure of ∏ type; Described pot body is made up of upper collecting chamber, next part case, down-comer, stay pipe, coiled pipe group, back water screen tube, side water wall tube, preceding water screen tube; The awl bucket shape stove that has fixed grate is low, revolve the flame wall, foldede flame wall, the fire-resistant body of wall of sealing have constituted series connection burning radiation chamber and convection current cooling chamber, be respectively equipped with the next part case in that the wall of burning radiation chamber is upper and lower, between them, be furnished with side water wall tube, preceding water screen tube, back water screen tube; Be provided with stay pipe between the different upper collecting chambers and between the next part case; In the convection current cooling chamber, be furnished with coiled pipe group, secondary air preheater and main air preheater, the lower end of coiled pipe group is connected with rear set box, the upper end is connected with a described upper collecting chamber, the two ends of this upper collecting chamber are connected with the next part case by down-comer, and described upper end forward and backward, side water wall tube is connected by another upper collecting chamber; Rear set box connects the inner of main water inlet valve port.

Described upper and lower collection case by preceding upper collecting chamber, preceding next part case, go up in the collection case, down in collection case, rear set box, upside collection case, downside collection case form, preceding upper collecting chamber and preceding next part case are positioned at the upper and lower side that flame wall opposite one side is revolved in the burning radiation chamber; In going up the collection case and down in the collection case be positioned at the bottom of revolving the flame wall and the top, top of foldede flame wall; Rear set box is positioned at the inner of described main water inlet valve port; Upper and lower side collection case and be connected to before upper collecting chamber with last between the collection case and before next part case and following middle collection between the case.

The utlity model has following characteristics:

1, in the bottom of burning radiation chamber the awl bucket shape furnace bottom that is made of refractory material is set, at the center of awl bucket shape furnace bottom one cover fixed cast-iron fire grate is set, make on the one hand water-coal-slurry not burn bulky grain and fall and on fire grate, can be burnt away, also provide condition on the other hand for the manual igniting of the fuel such as firewood beyond the coal water slurry boiler oil removing igniting.

2, in burning radiation chamber one side of burning radiation chamber and convection current cooling chamber fire-resisting partition, the bottom is provided with revolves the flame wall, top is provided with smoke wall, and the air-flow after the water-coal-slurry atomizing is caught fire can effectively be rotated and reflect, thereby reaches the purpose of abundant smooth combustion, efficient heat transfer.

3, according to given boiler parameter and water-coal-slurry catch fire, burning, emission request, can design the burning radiation chamber and the convection current cooling chamber of a certain size and shape, simultaneously, on the wall of burning radiation chamber, lay the water screen tube of certain water-cooled degree, in the convection current cooling chamber, arrange convection current coiled pipe group, secondary air preheater and the main air preheater of certain heating surface area.

The utility model compared with prior art has the following advantages:

Burning radiation chamber and the awl bucket shape furnace bottom that has fixed grate that fractional cold is suitable can guarantee in time catching fire and smooth combustion of water-coal-slurry various ignition mode; Revolve flame wall and foldede flame wall for the abundant burning of suspension pulverized coal particle, burn and conduct heat and all have active and effective effect; ∏ type structure helps the after-flame of coal particle, helps reducing that flue dust enters and the cleaning of in-furnace dust dirt, also helps boiler inspection and repairing simultaneously; Omnidistance countercurrent flow can improve the overall efficiency of boiler greatly.

Description of drawings

Below in conjunction with accompanying drawing structure of the present utility model is described in further detail:

Fig. 1 is a general structure cross-sectional schematic of the present utility model;

Fig. 2 is the A-A cutaway view of Fig. 1;

Fig. 3 is that half sectional view is looked on the left side of Fig. 1.

The specific embodiment

Referring to Fig. 1-Fig. 3, the utility model comprises pot body 7, main air preheater 31, secondary air preheater 28, water coal slurry burner 37, the fire-resistant body of wall 20 of sealing, heat-insulation layer 19, awl bucket shape furnace bottom 36, revolves convection current cooling chamber 39, exhanst gas outlet 27, fire grate 35, fire door 33, shoot door 34, dust-cleaning door 30, the mental package skin 21 of flame wall 2, foldede flame wall 3, burning radiation chamber 38 and one side.Pot body 7 by rear set box 23, go up in collection case 16, down in collection case 22, downside collection case 44, preceding next part case 1, preceding upper collecting chamber 6, upside collection case 43, down-comer 40, support 41, coiled pipe group 18, back water screen tube 14, side water wall tube 5, preceding water screen tube 4 form.Preceding upper collecting chamber 6 and preceding next part case 1 are positioned at the upper and lower side that flame wall 2 opposites one side is revolved in burning radiation chamber 38; In going up collection case 16 and down in collection case 22 be positioned at the bottom of revolving flame wall 2 and the top, top of foldede flame wall 3; Rear set box 23 is positioned at the inner of described main water inlet valve port 24; Before being connected to, upper and lower side collection case 43 and 44 reaches between preceding next part case 1 and the middle down collection case 22 between upper collecting chamber 6 and the last middle collection case 16.Lay back water screen tube 14, the side water wall tube 5 of symmetric arrangement, the fire-resistant body of wall 20 of sealing of preceding water screen tube 4, have the awl bucket shape furnace bottom 36 of fire grate 35, revolve flame wall 2 and foldede flame wall 3 and constituted the water-coal-slurry burning radiation chamber 38 that catches fire jointly.Revolve flame wall 2, foldede flame wall 3, seal the convection current cooling chamber 39 that fire-resistant body of wall 20 has constituted boiler, this chamber is laid coiled pipe group 18, secondary air preheater 28 and main air preheater 31 from top to bottom successively.Above foldede flame wall 3, leave passage 17, the burning radiation chamber 38 at it and two ends and the convection current cooling chamber 39 common bodies of heater that constitute ∏ shape structures.Be provided with igniting and maintenance fire door 33 in the side of awl bucket shape furnace bottom 36, the side of ash chamber 32, bottom is provided with shoot door 34.Foot at convection current cooling chamber 39 is provided with dirt chamber 29, and its side is provided with dust-cleaning door 30.For boiler safety normally moves, on pot body 7, also be provided with the blowoff valve 26 of safety valve 42, thermometer 11, Pressure gauge 46, main water inlet valve port 24, non-return valve 25, coiled pipe group, blowoff valve 45, main air collector 8, pair air collector 15, automatic exhaust steam valve 10, manual exhaust valve 9, main water outlet valve port 12 and the explosion proof door 13 of water screen tube.

Flue gas flow is such, water-coal-slurry is after 38 preceding bottoms, burning radiation chamber spray into atomizing, in the hyperthermia radiation environment of awl bucket shape furnace bottom 36, evaporate and catch fire, thermal-flame and flue gas that the pulverized coal particle that catches fire forms, revolved the effect of flame wall 2, rotation rises to top in burning radiation chamber 38, approached front wall top and 90 degree turning admission passages 17 by foldede flame wall 3 then, 90 degree are turned and are entered convection current cooling chamber 39 again, transversal flow convection current coiled pipe group 18 back parallel baffled second and first order air preheater 28 and 31,90 degree turnings are left boiler from exhanst gas outlet 27 and are entered smoke processing system more at last.

The water circulation process is such, enter the rear set box 23 of boiler and disperse to enter convection current coiled pipe group 18 from main water intaking valve 24 pressure by circulating pump at the heating system cooled recirculated water that dispels the heat, enter high temperature section by the flue gas low-temperature section, collect case 16 during medium after the heating comes together in and enter Xia Zhongji case 22 by two down-comers 40 at its two ends, collection case 22 down, 2 downside collection casees 44, preceding next part case 1 communicates with each other, medium in it is under the promotion of circulating pump, respectively by the back water screen tube 14 on it, side water wall tube 5, before water screen tube 4 compile enter before upper collecting chamber 6, and by main air collector 8 and on main water outlet valve port 12 leave boiler and enter heating system.

I and II air preheater 31 and 28 is connected mutually, the required cold air preheating in first order air preheater 31 earlier of burning, and then send into 28 preheatings of second level air preheater, after the cool water mixture burning machine is sent into burning radiation chamber 38.

Claims (2)

1, a kind of novel water-coal-slurry hot-water boiler, comprise a pot body (7), burning radiation chamber (38), revolve flame wall (2), foldede flame wall (3), seal fire-resistant body of wall (20), heat-insulation layer (19), mental package skin (21) form, it is characterized in that: described burning radiation chamber (38) is provided with awl bucket shape furnace bottom (36), being provided with a fixed grate (35) in the middle, is grey chamber (32) in the below of fixed grate (35); Side in burning radiation chamber (38) is provided with convection current cooling chamber (39), the flame of revolving wall (2) is arranged at bottom between the two, the foldede flame wall (3) of it and top is connected as a single entity, and leaving passage (17) in the top of foldede flame wall (3), this passage (17) makes burning radiation chamber (38) and convection current cooling chamber (39) form the structure of ∏ type; Described pot body (7) is made up of upper collecting chamber, next part case, down-comer (40), stay pipe (41), coiled pipe group (18), back water screen tube (14), side water wall tube (5), preceding water screen tube (4); Have fixed grate (35) awl bucket shape stove low (36), revolve flame wall (2), foldede flame wall (3), seal burning radiation chamber (38) and convection current cooling chamber (39) that fire-resistant body of wall (20) has constituted series connection, at the upper and lower next part case that is respectively equipped with of the wall of burning radiation chamber (38), between them, be furnished with side water wall tube (5), preceding water screen tube (4), back water screen tube (14); Be provided with stay pipe (41) between the different upper collecting chambers and between the next part case; In convection current cooling chamber (39), be furnished with coiled pipe group (18), secondary air preheater (28) and main air preheater (31), the lower end of coiled pipe group (18) is connected with rear set box (23), the upper end is connected with a described upper collecting chamber, the two ends of this upper collecting chamber are connected with the next part case by down-comer, and the upper end of described forward and backward, side water wall tube (4), (14), (5) is connected by another upper collecting chamber; Rear set box (23) connects the inner of main water inlet valve port (24).

2, novel water-coal-slurry hot-water boiler according to claim 1, it is characterized in that: described upper and lower collection case by preceding upper collecting chamber (6), preceding next part case (1), go up in collection case (16), down in collection case (22), rear set box (23), upside collection case (43), downside collection case (44) form, preceding upper collecting chamber (6) and preceding next part case (1) are positioned at the upper and lower side that flame wall (2) opposite one side is revolved in burning radiation chamber (38); In going up collection case (16) and down in collect case (22) and be positioned at the bottom of revolving flame wall (2) and the top, top of foldede flame wall (3); Rear set box (23) is positioned at the inner of described main water inlet valve port (24); Upper and lower side collection case (43) and (44) are connected between preceding upper collecting chamber (6) and the last middle collection case (16) and reach between preceding next part case (1) and the following middle collection case (22).

Images