CN218328115U - Biomass assembled chain boiler with front-mounted hearth - Google Patents

Abstract

The utility model relates to a leading furnace living beings equipment chain boiler, leading furnace living beings equipment chain boiler includes leading furnace, go up the barrel, barrel and convection heating surface subassembly down, leading furnace sets up the front side at last barrel and barrel down, leading furnace's oven is the diaphragm type wall structure, leading furnace's back wall upper portion is equipped with exhanst gas outlet, exhanst gas outlet and convection heating surface subassembly intercommunication, convection heating surface subassembly includes preceding convection bank and back convection bank, preceding convection bank and back convection bank set up between last barrel and lower barrel, the preceding convection bank and the back convection bank that are located both sides are diaphragm type wall structure, form the flue. The utility model discloses a leading furnace living beings equipment chain boiler, rational in infrastructure, combustion efficiency is high, and biomass fuel burns the difficult slagging scorification, can realize the low-nitrogen combustion, reduces nitrogen oxide's original emission.

Description

Biomass assembled chain boiler with front-mounted hearth

Technical Field

The utility model relates to a boiler technical field, concretely relates to leading furnace living beings equipment chain boiler.

Background

At present, in order to protect the environment and accelerate the clean and efficient utilization of coal, the usage amount of a coal-fired boiler is less and less, a biomass fuel boiler is used instead, the biomass fuel boiler adopts biomass briquette fuel, the biomass briquette fuel is clean and low-carbon renewable energy and is used as boiler fuel, the biomass briquette fuel is high-quality environment-friendly fuel for replacing conventional fossil energy, has the characteristics of sulfur content, ash content far lower than that of coal and zero emission of carbon dioxide, is clean energy for replacing coal advocated by the nation, and has wide market space, the biomass briquette fuel has small volume, large specific gravity and density, is convenient to process, convert, store, transport and continuously use, has high activity of volatile matters and carbon, extremely low waste heat in ash slag, and has the combustion efficiency of more than 98%.

The biomass boiler burns biomass fuel, has simple structure, convenient operation, relatively low investment and running cost and great market advantage, but has high requirement on combustion temperature in a hearth due to low ash melting point of the biomass fuel, easy slag bonding and easy slag bonding after biomass burning, burns biomass briquette fuel, and is limited by the integral structure, thereby resulting in small hearth volume, small heating area, high temperature in the furnace, easy slag bonding, high original emission of nitrogen oxides and serious ash accumulation on the heating surface. For example, the invention patent of application publication No. CN103925592A discloses a biomass chain boiler, wherein a hearth of the biomass chain boiler is arranged below an upper boiler barrel, and is limited by an integral structure, the volume of the hearth is small, and the temperature in the hearth is easily high during actual use, so that the problems of slagging on a heating surface, high-temperature corrosion, tube explosion on the heating surface and high original emission of nitrogen oxides are caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a leading furnace living beings equipment chain boiler solves the above-mentioned problem that present living beings chain boiler exists.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the biomass assembled chain boiler with the front-mounted hearth comprises the front-mounted hearth, an upper drum, a lower drum and a convection heating surface assembly, wherein the front-mounted hearth is arranged on the front sides of the upper drum and the lower drum, the furnace wall of the front-mounted hearth is of a membrane wall structure, a flue gas outlet is formed in the upper part of the rear wall of the front-mounted hearth, and the flue gas outlet is communicated with the convection heating surface assembly; the convection heating surface assembly comprises a front convection tube bundle and a rear convection tube bundle, the front convection tube bundle and the rear convection tube bundle are arranged between the upper drum and the lower drum, and the front convection tube bundle and the rear convection tube bundle which are positioned on two sides are of film-type wall structures to form a flue.

Furthermore, a traveling grate is arranged at the bottom of the front hearth, and a plurality of air chambers are arranged in the traveling grate.

Furthermore, a push-pull ash discharging device is arranged below the air chamber.

Furthermore, secondary fans are arranged on the front wall and the rear wall of the front hearth.

Furthermore, a hopper is arranged on the front wall of the front hearth, and an air-closed discharger is arranged on the hopper.

Furthermore, a soot blower is arranged on the flue.

Furthermore, the rear end of the flue is sequentially connected with a coal economizer and an air preheater.

Furthermore, the preposed hearth is supported by a hearth steel frame, the upper boiler barrel, the lower boiler barrel and the convection heating surface assembly are supported by a furnace body steel frame, and the economizer and the air preheater are supported by a tail steel frame.

The utility model has the advantages that:

the utility model discloses a leading furnace living beings equipment chain boiler, through with leading furnace setting at the front side of last drum and lower drum, and leading furnace's oven adopts the diaphragm type wall structure to make furnace's size no longer receive the furnace body structure restriction, furnace's volume is bigger, and the week interfacial area is big, and the water-cooling is high, and the furnace temperature is low, can solve the problem that biomass fuel slagging scorification and the original emission of nitrogen oxide are high. Simultaneously, set up to the membrane wall structure through preceding convection bank with the both sides and back convection bank, can guarantee the leakproofness of flue.

Furthermore, the soot blower arranged on the flue can avoid the problem that the biomass fuel deposits dust in the flue.

Further, furnace sets up alone, supports through the furnace steelframe, and on-spot simple to operate guarantees the installation quality, makes the grate no longer bearing simultaneously, can simplify the grate structure, alleviates the grate quality, optimizes operating condition.

Drawings

Fig. 1 is a schematic diagram of the biomass assembled chain boiler with the front hearth of the utility model.

Names corresponding to the marks in the figure:

1. the boiler comprises a front hearth, 101, a flue gas outlet, 102, a front wall, 103, a rear wall, 2, an upper boiler barrel, 3, a lower boiler barrel, 4, a front convection tube bundle, 5, a rear convection tube bundle, 6, a traveling grate, 7, a hopper, 8, a soot blower, 9, an economizer, 10, an air preheater, 11, a hearth steel frame, 12, a furnace body steel frame, 13, a tail steel frame, 14 and a secondary air port.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art all belong to the protection scope of the present invention.

Embodiment 1 of the utility model:

the embodiment of the utility model provides an in leading furnace living beings equipment chain boiler is through setting up furnace and boiler body separation, no longer receives boiler body size restriction to widen the grate width, enlarge the furnace space, reach the purpose that improves combustion efficiency.

Specifically, as shown in fig. 1, the biomass assembly chain boiler with the front hearth comprises a front hearth 1, an upper drum 2, a lower drum 3 and a convection heating surface assembly, wherein the front hearth 1 is arranged on the front sides of the upper drum 2 and the lower drum 3, the wall of the front hearth 1 is of a membrane wall structure, a flue gas outlet 101 is arranged at the upper part of a rear wall 103 of the front hearth 1, the flue gas outlet 101 is communicated with the convection heating surface assembly, the convection heating surface assembly comprises a front convection tube bundle 4 and a rear convection tube bundle 5, the front convection tube bundle 4 and the rear convection tube bundle 5 are arranged between the upper drum 2 and the lower drum 3 and are communicated with the upper drum 2 and the lower drum 3, and the front convection tube bundle 4 and the rear convection tube bundle 5 on the left side and the right side are of the membrane wall structure, so as to form a flue.

Through the setting, with furnace from boiler body separation, no longer receive the restriction of body size, the grate width can increase, furnace widens thereupon, and the water wall pipe of wall no longer directly gets into drum 2 and lower drum 3 around the furnace, has more spaces, and the water wall structure has increased furnace's water-cooling degree simultaneously for the temperature is low in the furnace, and biomass fuel is difficult for the slagging scorification.

As shown in fig. 1, a traveling grate 6 is arranged at the bottom of a front hearth 1, a plurality of air chambers (not shown) are arranged in the traveling grate 6 to supply primary air into the hearth, in the embodiment, the interior of the grate is divided into 6 independent air chambers, each air chamber is provided with an air adjusting device, and hot air from an air preheater 10 enters through air inlet pipes at two sides of the grate.

Meanwhile, a push-pull ash discharging device is arranged below the air chamber, furnace ash can be stored, and air leakage and ash rising are effectively prevented.

In this embodiment, the secondary air ports 14 are disposed on the front wall 102 and the rear wall 103 of the front hearth 1, and are used for supplying secondary air into the hearth, so as to further improve the combustion efficiency.

In this embodiment, the hopper 7 is arranged on the front wall 102 of the front hearth 1 and used for supplying the biomass fuel to the front hearth 1, the wind-shielding discharger is arranged on the hopper 7, and the feeding amount is controlled by controlling the rotating speed of the wind-shielding discharger so as to adapt to the changing requirement of the boiler load.

In the embodiment, the pitch of the front convection tube bundle 4 is 180mm, and the pitch of the rear convection tube bundle 5 is 150mm, so that the heating surface of the convection tube bundle always keeps higher flue gas flow velocity, heat transfer is enhanced, and dust accumulation is avoided.

Convection bank that lies in the left and right sides among front convection bank 4 and convection bank that lies in the left and right sides among back convection bank 5 adopt the mode wall structure to form the flue, in this embodiment, for further avoiding the deposition, be provided with soot blower 8 on the flue for blow grey to the flue is interior.

As shown in fig. 1, a coal economizer 9 and an air preheater 10 are sequentially connected to the rear end of the flue, the coal economizer 9 is a fin-type cast iron coal economizer 9, inlet water flows into the coal economizer 9 from a water inlet header, water flows upwards against the direction of flue gas, and then the inlet water and the outlet water are collected into a whole and sent into the upper boiler barrel 2 and the lower boiler barrel 3 from a water outlet header.

The air preheater 10 uses phi 40X 2 seamed steel pipe, the material is Q235A, the low temperature section external enamel pipe, the preheater uses the bedroom layout, the control flows in the pipe, the smoke flows outside the pipe, the pipe uses the parallel arrangement, to prevent the ash.

As shown in figure 1, the front hearth 1 is supported by a hearth steel frame 11, in actual production, the front hearth 1 is assembled by front, rear and two side membrane walls, the whole lower part is supported, an upper hanging structure is fixed on the hearth steel frame 11, meanwhile, the whole of the upper boiler barrel 2, the lower boiler barrel 3 and the convection heating surface assembly is supported by a furnace body steel frame 12 standing on the foundation, and the economizer 9 and the control preheater are supported by a tail steel frame 13, so that the grate is not loaded any more, the grate structure is simplified, the weight of the grate is reduced, the working condition is optimized, and the field installation is convenient.

The working principle is as follows:

biomass fuel enters the front-mounted hearth 1 through the hopper 7, after the biomass fuel is combusted in the front-mounted hearth 1, smoke enters the convection heating surface assembly from a smoke outlet 101 arranged at the upper part of a rear wall 103 of the front-mounted hearth 1, finally enters the dust remover after passing through the economizer 9 and the air preheater 10, and is discharged through the chimney.

The utility model discloses a leading furnace living beings equipment chain boiler, rational in infrastructure, combustion efficiency is high, and biomass fuel burns the difficult slagging scorification, can realize the low-nitrogen combustion, reduces nitrogen oxide's original emission.

Claims (8)

1. Leading furnace living beings equipment chain boiler, its characterized in that: the device comprises a front hearth, an upper drum, a lower drum and a convection heating surface assembly, wherein the front hearth is arranged on the front sides of the upper drum and the lower drum, the furnace wall of the front hearth is of a membrane wall structure, a flue gas outlet is formed in the upper part of the rear wall of the front hearth, and the flue gas outlet is communicated with the convection heating surface assembly; the convection heating surface assembly comprises a front convection bank and a rear convection bank, the front convection bank and the rear convection bank are arranged between the upper drum and the lower drum, and the front convection bank and the rear convection bank which are positioned at two sides are of membrane wall structures to form a flue.

2. The front-hearth biomass assembly chain boiler according to claim 1, characterized in that: the bottom of the front hearth is provided with a traveling grate, and a plurality of air chambers are arranged in the traveling grate.

3. The front hearth biomass assembly chain boiler of claim 2, characterized in that: and a push-pull type ash discharging device is arranged below the air chamber.

4. The front-hearth biomass assembly chain boiler according to claim 1, characterized in that: and secondary fans are arranged on the front wall and the rear wall of the front hearth.

5. The front-hearth biomass assembly chain boiler according to claim 1, characterized in that: and a hopper is arranged on the front wall of the front hearth, and an air-closed discharger is arranged on the hopper.

6. The front-hearth biomass assembly chain boiler according to claim 1, characterized in that: and a soot blower is arranged on the flue.

7. The front hearth biomass assembly chain boiler of claim 1, characterized in that: the rear end of the flue is sequentially connected with an economizer and an air preheater.

8. The front-hearth biomass assembly chain boiler according to claim 7, characterized in that: the pre-positioned hearth is supported by a hearth steel frame, the upper boiler barrel, the lower boiler barrel and the convection heating surface component are supported by a furnace body steel frame, and the economizer and the air preheater are supported by a tail steel frame.

Images