CN212511107U

CN212511107U - Straw gasification combustion heat supply boiler

Info

Publication number: CN212511107U
Application number: CN202021224633.8U
Authority: CN
Inventors: 朱泽玉
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2021-02-09
Anticipated expiration: 2030-06-29

Abstract

The utility model relates to a straw gasification combustion boiler, include: the boiler comprises a boiler body, a heat insulation layer, a hearth, an upper boiler barrel, a lower boiler barrel, a longitudinal header, a transverse header, a hopper, a chain grate, an air supply device, an energy saver and a flue gas discharge device. The utility model discloses straw gasification burning heat supply boiler can put whole package straw in the hopper, puts on the traveling grate stoker through broken back shop of the broken device of wrapping of straw, has saved and has impeld conveying machinery, has saved labour cost and manufacturing cost, and is pollution-free. The environment is purified, and the combustion-supporting wall and the flue gas return wall are arranged in the hearth, so that the straws are fully combusted in the hearth, the coking is avoided, the ash removal is facilitated, and the heat efficiency is high; the straw bag breaking device is organically combined with the boiler, so that the boiler is integrated, the whole space is greatly compressed, the defects of the original overhead boiler are overcome, the operation and the maintenance are more convenient, the safe production is guaranteed, the fuel cost is reduced, and the straw is used as the boiler fuel to really realize zero distance.

Description

Straw gasification combustion heat supply boiler

Technical Field

The utility model relates to the technical field of boilers, concretely relates to straw gasification burning heat supply boiler.

Background

Biomass is the only renewable energy source, and has many distinct characteristics compared with coal as a fuel. The biomass has more oxygen content than coal, is easy to ignite, can realize low-temperature combustion, and reduces the emission of NO. The sulfur content in the biomass is very low, and the biomass can reach the relevant environmental protection standard without arranging a special flue gas desulfurization device during combustion, thereby reducing the cost and being beneficial to environmental protection. The carbon content of the biomass fuel is about 40-55% less than that of coal, and the emission concentration of the smoke pollutants can meet the requirements of the national emission standard of boiler atmospheric pollutants. The biomass boiler has higher thermal efficiency than a coal-fired boiler, and can reach about 85 percent.

More than 10 hundred million tons of biomass are produced in China every year, and the utilization of the straw is very good. The full utilization of biomass energy is an important measure for reducing carbon dioxide emission, strengthening environmental protection and benefiting the nation and the people

As a raw material for producing energy, the energy-saving combustion heat supply device is mainly used for combustion heat supply in the boiler industry at present. Under the condition that the environmental improvement and the atmospheric pollution reduction improvement are increased continuously, the comprehensive utilization of agricultural residues and straws, particularly as a fuel source of a boiler, is proposed on a agenda.

The process flow adopted by the existing boiler for burning straws is to pack in the field, transport the straws to a factory, screen and remove impurities, crush the straws, dry the straws, granulate the straws and then use the straws as granular fuel for industrial production and civil boilers. The production process is complicated, the energy consumption is high, the price of the straw processed into the granular fuel is high, the price is more than three times of that of the straw raw material, the straw is difficult to accept in the market, and the popularization and the application of the straw as the fuel are restricted to a great extent.

The whole straw package is broken and then sent into a boiler for combustion, coal and biomass particles are replaced, the fuel cost is saved, the environmental pollution is treated, the smoke emission concentration is reduced, a good effect is achieved, and a new way is opened up for the energy utilization of the boiler industry.

At present, partial boiler researches send whole bags of straws into a boiler for combustion, but the effect is not ideal, and the problems of insufficient combustion, large straw consumption, small heat energy, coking, pollution and the like exist.

Disclosure of Invention

The utility model aims at providing a straw gasification burning heat supply boiler can realize that whole package straw is fully burnt in the boiler after broken package device dispersion, and the environmental protection is pollution-free, and the coking piece is not, and the ash removal is effectual. The straw combustion technology and the hot water boiler are organically combined, the advantages of the straw combustion technology and the hot water boiler are fully exerted, the boiler and the boiler are integrated, the whole space is greatly compressed, the defect of high boiler is overcome, the material cost is saved, the production and manufacturing cost is reduced, the use, the operation and the maintenance are more convenient, and the safety production is guaranteed.

In order to achieve the above purpose, the technical scheme of the utility model is that: a straw gasification combustion heat supply boiler, comprising: the boiler comprises a boiler body, a heat preservation layer, a hearth, an upper boiler barrel, a lower boiler barrel, a longitudinal collecting box, a transverse collecting box, a hopper, a chain grate, an air supply device, an energy saver and a flue gas discharge device, wherein the boiler body consists of a boiler wall and the heat preservation layer; the front of the furnace body is fixedly provided with a hopper, a straw bale breaking device is arranged in the hopper, the straw bale breaking device is provided with a speed reducer, and a chain grate is fixedly arranged below the hopper and the straw bale breaking device and matched with the speed reducer.

The straw bale breaking device comprises: the bag breaking roller and the crushing blades are fixedly arranged on the roller, and the number of the bag breaking roller can be two or three.

The air supply device comprises: the primary air supply device is arranged below the chain grate, and the secondary air supply device is arranged in the hearth.

The fume emission device comprises: draught fan, flue gas duct and chimney.

An air hopper is arranged in the ash collecting chamber below the chain grate, and a slag discharging machine is arranged outside the ash collecting chamber.

The utility model discloses straw gasification burning heat supply boiler can put whole package straw in the hopper, puts on the traveling grate stoker through broken back shop of the broken device of wrapping of straw, has saved and has impeld conveying machinery, has saved labour cost and manufacturing cost, and is pollution-free. The environment is purified, and the combustion-supporting wall and the flue gas return wall are arranged in the hearth, so that the straws are fully combusted in the hearth, the coking is avoided, the ash removal is facilitated, and the heat efficiency is high; the straw bag breaking device is organically combined with the boiler, so that the boiler is integrated, the whole space is greatly compressed, the defects of the original overhead boiler are overcome, the operation and the maintenance are more convenient, the safe production is guaranteed, the fuel cost is reduced, and the straw is used as the boiler fuel to really realize zero distance.

The present invention will be described in further detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a top view of FIG. 1;

fig. 3 is a side view of fig. 1.

In the figure, 1, a chain grate, 2, a hopper, 4, a hearth, 5, an upper boiler barrel, 6, a combustion-supporting wall, 7, a water outlet pipe seat, 8, a heat collecting pipe bundle, 9, a lower boiler barrel, 10, a smoke outlet, 11, an energy saver, 12, a transverse header, 13, a foundation, 14, a slag extractor, 15, a longitudinal header, 16, a heat insulating layer, 17, a furnace wall, 18, a straw bale breaking device, 19, a grate speed reducer, 20, a water inlet pipe, 21, an induced draft fan, 22, a smoke duct, 23, a chimney, 24, a blower, 25, a furnace arch, 26, a furnace door, 28, a smoke return wall, 31, a flame jet orifice, 33, a secondary air supply port and 35 are arranged in the furnace arch.

Detailed Description

As shown in the figure, the utility model relates to a straw gasification burning heat supply boiler, include: the boiler comprises a boiler body, a heat insulation layer 16, a hearth 4, an upper boiler barrel 5, a lower boiler barrel 9, a longitudinal header 15, a transverse header 12, a hopper 2, a chain grate 1, an air supply device, an economizer 11 and a flue gas discharge device, wherein the boiler body consists of a boiler wall 17 and the heat insulation layer 16, the hearth 4 is arranged in the boiler body, a plurality of heat collecting pipe bundles 8 are fixedly arranged above the inner part of the hearth and are respectively connected with the upper boiler barrel 5 and the lower boiler barrel 9, a furnace arch 25 is fixedly arranged in the hearth 4, a flue gas outlet 10 is arranged at the rear end of the hearth and is connected with the economizer 11 and the flue gas discharge device through a flue gas duct 22, the boiler is provided with the air supply device, a combustion supporting wall 6 and a flue gas return wall 28 are respectively arranged in the hearth from front to back, a plurality of flame jet orifices 31 are arranged on the combustion supporting wall; the front of the furnace body is fixedly provided with a hopper 2, a straw bale breaking device 18 is arranged in the hopper, the straw bale breaking device is provided with a speed reducer 35, and a chain grate 1 is fixedly arranged below the hopper and the straw bale breaking device and matched with the hopper and the straw bale breaking device.

The straw bale breaking device 18 comprises: the bag breaking roller and the crushing blades are fixedly arranged on the roller, and the number of the bag breaking roller can be two or three.

The fume emission device comprises: an induced draft fan 21, a smoke air duct 22 and a smoke tube 23.

An air hopper is arranged in the ash collecting chamber below the chain grate, and a slag discharging machine 14 is arranged outside the ash collecting chamber.

Principle of operation

Prepared bundled straws are put into a hopper 2 through a loading device, the bundled straws are crushed by a straw crushing device and are flatly laid on a chain grate 1, the chain grate 1 slowly pushes fuel into a hearth 4, a chain grate 1 driving device drives a chain wheel to continuously rotate by a grate reducer 19 and drives the fuel to slowly burn and advance, meanwhile, burnt ash is discharged into an ash hopper, and the ash is discharged to the outside by a slag discharging machine 14.

The straws are combusted on the fire grate, and the primary air supply device is arranged at the bottom of the fire grate to provide sufficient oxygen for straw combustion. A primary air supply device is arranged in the hearth, so that flame can be fully combusted. The hot flame enters the hearth 4 of the hot water boiler, passes through the water-cooled wall of the hearth wall 17, passes through the combustion-supporting wall 6, the flue gas return wall 28, the heat collecting tube bundle 8, the upper boiler barrel 5 and the lower boiler barrel 9, carries out energy conversion, and provides a heat source for using heat for steam. A flue gas outlet 10 at the tail part of the boiler is connected with an economizer 11, and flue gas enters a chimney through an induced draft fan and is discharged into the atmosphere.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A straw gasification combustion heat supply boiler, comprising: furnace body, heat preservation (16), furnace (4), go up boiler drum (5), lower boiler drum (9), indulge collection box (15), violently collection box (12), hopper (2), traveling grate stoker (1), air feed device, energy-saving appliance (11) and flue gas discharging equipment, the furnace body comprises brickwork (17) and heat preservation (16), sets up furnace (4) in the furnace body, and the fixed heat collection tube bank of a plurality of (8) that sets up in the furnace upper place, this tube bank is connected with last boiler drum (5) and lower boiler drum (9) respectively, and furnace (4) internal fixation sets up furnace arch (25), and the furnace rear end sets up exhanst gas outlet (10) and is connected with energy-saving appliance (11) and flue gas discharging equipment through flue (22), and the boiler sets up air feed device, its characterized in that: a combustion-supporting wall (6) and a flue gas return wall (28) are respectively arranged in the hearth from front to back, a plurality of firework jet orifices (31) are arranged on the combustion-supporting wall, and a plurality of secondary air supply ports (33) are arranged corresponding to the firework jet orifices; the front of the furnace body is fixedly provided with a hopper (2), a straw bag breaking device (18) is arranged in the hopper, the straw bag breaking device is provided with a speed reducer (35), and a chain grate (1) is fixedly arranged below the hopper and the straw bag breaking device and matched with the hopper and the straw bag breaking device.

2. The straw gasification combustion heat supply boiler of claim 1, wherein: the straw bale breaking device (18) comprises: the bag breaking roller and the crushing blades are fixedly arranged on the roller, and the number of the bag breaking roller can be two or three.

3. The straw gasification combustion heat supply boiler of claim 1, wherein: the air supply device comprises: the primary air supply device is arranged below the chain grate, and the secondary air supply device is arranged in the hearth.