CN201129712Y

CN201129712Y - Horizontal type inverse burning environment protection steam boilers

Info

Publication number: CN201129712Y
Application number: CNU200720089400XU
Authority: CN
Inventors: 刘宗华
Original assignee: TAIKANG YINCHEN BOILER CO Ltd
Current assignee: TAIKANG YINCHEN BOILER CO Ltd
Priority date: 2007-02-05
Filing date: 2007-02-05
Publication date: 2008-10-08
Anticipated expiration: 2017-02-05

Abstract

A horizontal counter heating environment protection steam boiler comprises two areas of a furnace and a convection tube bundle area, which are separated by a baffle wall and are mutually communicated at the opening part under the baffle wall. In order to enlarge the heat area, a water cooling wall-pipe and a water cooling calandria are arranged in the furnace, a flue gas channel and a dirt settling chamber are formed on the circumference of the convection tube bundle area between a top and a bottom drums, two layers of baffle wall are charged in the convection tube bundle area, the device can obtain sufficient heat through the low-heat value coal in the natural ventilation or lower smoke flow speed condition, further control the smoke discharge and the noise pollution effectively. The boiler has the advantages of simple structure, inexpensive cost, solves the problem of releasing black smoke thoroughly. The discharged waste gas can't pollute the environment and reaches the pure smokeless effect. The Ringelmen blackness degree is zero. The horizontal counter heating environment protection steam boiler saves the coal resource, improves the heat efficiency and protects the environment, which has obvious economic benefit and the social benefit.

Description

Horizontal anti-burning environmental protection steam boiler

Technical field

The present invention relates to the boiler technology field, relate to the coal-fired environment-protection boiler of a kind of three backhauls specifically.

Background technology

At present, Industrial Boiler remains in the mill pursues overheavy firing and augmentation of heat transfer and to the protection of environment, its major measure is: the one, improve flue gas flow rate, and the 2nd, increase the ratio of radiation heating-surface and in burner hearth, arrange the smoke abatement and dust control measure.Boiler plant increased when the former drawback was, structure complicated; The assorted use that has limited the low heat value coal of the latter.

Summary of the invention

The objective of the invention is the drawback of aforementioned known boilers design is improved, apparatus arrangement is rationalized, reduced the discharging and the noise pollution of flue dust, and can be applicable to the use of low heat value coal.

The content of technical scheme of the present invention is: construct so horizontal anti-burning environmental protection steam boiler, it has combustion zone and convection bank district to constitute, and its primary structure characteristics are:

1, the boiler form is horizontal packaged water-tube boiler, and flue gas recirculation is three return structures.This boiler has upper and lower two drums of vertically arranging.The front portion of upper drum and two side water wall tubes are formed the radiation of burner hearth heating surface, form convection heating surface by the pipe of bending between rear portion and the lower drum.Respectively arrange a collection case at furnace front and both sides.Be connected two group water screen tubes with collection between the case at drum, place the burner hearth both sides respectively.Packed refractory material is inlayed in the water screen tube outside of burner hearth both sides, and these sealing refractory materials promptly constitute the both sides furnace wall of burner hearth, and placing the pipe in the burner hearth is the water screen tube of boiler, and remaining pipe is the convection bank of boiler.Water screen tube and convection bank form the water-flow circuit of sealing.Described combustion zone and convection bank district are divided into former and later two spaces by partition wall, and the space installing double-layer grate of front constitutes the naked light combustion chamber; The space of back forms exhaust gases passes and laying dust chamber and exhaust gases passes by lower drum and convection bank.

2, design performance advanced person:

The main heating surface tube of this boiler adopts 20 ^#Seamless steel tubes for low and medium pressure is made, and drum adopts the boiler steel plate special to make.Drum internal diameter φ 900mm, wall thickness 10mm, preceding, left and right collection case adopt φ 159 * 6 seamless steel pipes to make.

3. in order better to reach the dedusting in stove purpose, arranged that in burner hearth the water pipe furnace grate of 17 φ 57 makes fuel that the chance of second-time burning be arranged.Boiler front wall, middle walls and back wall adopt general fire brick to build by laying bricks or stones and form.

4. the fire grate air distribution is reasonable, and the combustion chamber is bigger, and the coal applicability is strong.Adapt to all kinds of bituminous coal or anthracite, mixing coal.Sufficient combustion.Because the second-time burning of fuel, high-temperature flue gas fully purify in burner hearth, fly ash particle enters preceding convection bank by the middle walls passage, thereby smoke medicining dust-removing effect is good.

5. the water circulation is simple, and pressure-containing parts is rational in infrastructure, under the feelings that guarantee water quality, and fully can safe operation.

6. combustion apparatus is the hand moving grate of fast-assembling, and combustion apparatus is made in factory and installed, and is transported to be directly installed on the ground behind the building site to get final product.Have rational in infrastructurely, compact, steel consumption is low, makes boiler performance, weight, physical dimension have tangible advance with domestic comparing with the capacity product.

Advantage of the present utility model can be drawn by the analysis of said structure feature:

1, the anti-combustion system that burns of double-layer grate naked light, and be in again in the burner hearth of high temperature, help improving fire box temperature, reduce heat loss due to unburned gas and heat loss of imperfect solid combustion, and the generation of minimizing carbon black, increase applicability to low heating coal.

2, add two-layer smoke wall on boiler lower drum top, can guarantee that flue gas washes away, strengthens the heat exchange effect walking crosswise of lower drum convection bank district, can increase flue gas flow again, realize abundant heat exchange and dust deposition.

3, the fire grate air distribution is reasonable, and the combustion chamber is bigger, and coal adaptability is strong.Adapt to all kinds of bituminous coal or anthracite, mixing coal, sufficient combustion.Because the second-time burning of fuel, high-temperature flue gas fully purify in burner hearth, fly ash particle enters convection bank by partition wall, has reduced the discharge capacity of flue dust, helps environmental protection.

4, burner hearth and convection bank separate out, the increase that water pipe furnace grate area and heat convection area again can be synchronous, and this boiler is achieved the dust removing effects of boiler.Also make and save in the boiler corollary equipment that economizer etc. is huge, power consumption, need the device of affected maintenance to become possibility.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the main TV structure schematic diagram of flue gas flow direction of the present utility model.

Fig. 2 is the utility model A--A cutaway view.

Fig. 3 is the utility model B--B cutaway view.

Among the figure: 1. upper drum, 2. in water screen tube, 3. water-cooled grate, 4. lower fire grating, 5. laying dust chamber, 6. lower drum, 7. smoke wall, 8. convection bank district, 9. bottom smoke inlet place, 10. partition wall.

The specific embodiment

The specific embodiment of the present utility model can be described according to Figure of description.

Particle roughly uniformly fuel by on the water-cooled grate of manually precipitating in being arranged in burner hearth on 3, utilize the burning things which may cause a fire disaster of lower fire grating 4 carrying out fire burns, in the hyperthermia radiation heating water-cooled grate tube that between upper fire-grating and lower fire grating, produces and upper drum 1 and the burner hearth in the water screen tube 2 through burning, high-temperature flue gas under low flue gas flow rate state enters into the convection bank district 8 on lower drum 6 tops through the smoke inlet place 9 of partition wall 10 bottoms, the high-temperature flue gas that the burner hearth burning produces carries out transversal flow by 7 pairs of convection banks of smoke wall, has realized sufficient heat exchange.Meanwhile, flue gas has been realized the flue dust separation in the convection bank district, and precipitum falls into the laying dust chamber 5 of lower drum both sides, by manually it regularly being removed.The flue gas of discharge standard up to specification enters flue by exhanst gas outlet at last, by flue to chimney flue gas is entered atmosphere.

In order better to suppress soot emissions, can between the floss hole of boiler plant and chimney, install by-pass valve control, so that poke fire, when going out cinder, prevent that flue dust from entering atmosphere operating personnel.

When the flue of boiler between chimney is longer, can air-introduced machine be installed at the smoke canal elbow place as one sees fit, with suitable adjustment air inducing power, under the situation of control flue dust and noise pollution standard, keep certain combustion intensity and heat transfer intensity.

Claims

1. horizontal anti-burning environmental protection steam boiler, flue gas recirculation is three return structures, this boiler has upper and lower two drums of vertically arranging, the front portion of upper drum and two side water wall tubes are formed the radiation of burner hearth heating surface, form convection heating surface by the pipe of bending between rear portion and the lower drum, respectively arrange a collection case in furnace front and both sides, be connected two groups of water screen tubes with collecting between the case, place the burner hearth both sides respectively at drum; Packed refractory material is inlayed in the water screen tube outside of burner hearth both sides, these sealing refractory materials promptly constitute the both sides furnace wall of burner hearth, placing the pipe in the burner hearth is the water screen tube of boiler, remaining pipe is the convection bank of boiler, water screen tube and convection bank form the water-flow circuit of sealing, described combustion zone and convection bank district are divided into former and later two spaces by partition wall, and the space installing double-layer grate of front constitutes the naked light combustion chamber; The space of back forms exhaust gases passes and laying dust chamber by lower drum and convection bank.

2. by the described boiler of claim 1, convection bank district and the combustion zone partition wall before by lower drum is divided into former and later two spaces, and it is characterized in that: the space installing double-layer grate of front constitutes the naked light combustion chamber; The space of back forms exhaust gases passes and laying dust chamber by lower drum and convection bank, and two spaces, front and back are connected by the opening part on partition wall right side.

3. by the described boiler of claim 1, the moving grate of installing in the burner hearth, it is characterized in that: lower floor is the metal bar shaped fire grate that ventilates and the slag that falls is used, top is the fire grate shape water pipe that becomes the boiler radiation heating-surface, this water pipe is connected with drum, inboard wall of burner hearth is built by laying bricks or stones with refractory material and is formed, and for realizing abundant heat exchange, is provided with wall-cooling surface in this burner hearth.

4. press the described boiler of claim 1, the space of back: form exhaust gases passes and laying dust chamber by lower drum and convection bank, it is characterized in that: in the exhaust gases passes in convection bank district, boiler lower drum top, add two-layer whole shape smoke wall; There is recess laying dust chamber drum both sides below this convection bank district.