CN206724144U

CN206724144U - A kind of flue gas and flying dust second-time burning heat reclaim unit

Info

Publication number: CN206724144U
Application number: CN201720471194.2U
Authority: CN
Inventors: 张久明
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-04-28
Filing date: 2017-04-28
Publication date: 2017-12-08
Anticipated expiration: 2027-04-28

Abstract

The utility model discloses a kind of flue gas and flying dust second-time burning heat reclaim unit, including boiler body, the right-hand member of the boiler body is connected with burner by connecting tube, the top side of the burner by pipeline by connecting methanol storing unit, and the exit of methanol storing unit is provided with control valve, the top opposite side of the burner is connected with oxygen-enriched generator equipment by pipeline, and the escape pipe of oxygen-enriched generator equipment is provided with oxygen-enriched control valve, the left end of the oxygen-enriched generator equipment is provided with electronic lighter, and electronic lighter is interspersed in the inner chamber of burner, the inner cavity top of the burner is provided with concentration sensor, the inwall of the burner is provided with water screen tube.The utility model reduces smoke evacuation band thermal loss, makes gas completely burned hot, while reduce boiler radiation loss, flue gas reduces heat loss with the secondary fully burning of flying dust, mitigates desulfurization and dedusting denitration device 80% and runs burden, improves energy utilization rate, reach and economize on resources, reduce the purpose of discharge.

Description

A kind of flue gas and flying dust second-time burning heat reclaim unit

Technical field

The utility model heating energy-saving technical field, more particularly to a kind of flue gas and flying dust second-time burning heat recovery method With device.

Background technology

13 planning propose, are decline 15% on energy consumption basis in 2015, and energy consumption keeps 5,000,000,000 tons of standard coals of total amount.Together When, China adds Paris agreement, promises to undertake that the year two thousand thirty fossil energy declines 60-65%, and control ocean temperature rise is no more than 2 degree, Global combusts fossil energy overall control is in 17,500,000,000 tons of standard coals.

Coal-burning boiler is the important power plant of China's energy transition transition and upgrade phase again, and coal-burning boiler efficiency is mainly following Several factors restrict：First, smoke evacuation band thermal loss；2nd, gas incomplete combustion heat loss；3rd, solid slag imperfect combustion Heat loss；4th, boiler radiation loss；5th, flying dust does not have completely burned heat loss about in 5-6% or so.

Flue gas loss：Briefly：This is the heat being pulled away with the discharge of flue gas, is heat loss due to exhaust gas.It is boiler Maximum one in heat loss, about 12% or so, the principal element for influenceing this loss is flue gas volume and exhaust gas temperature, cigarette It is also big to take away heat loss for the big high fume temperature of air space, then smoke evacuation.Loss that chemistry is imperfect combustion：Fuel institute in combustion Caused imflammable gas, can completely burned and discharged with flue gas, caused by heat loss, cry chemistry imperfect combustion loss.Shadow The principal element for ringing this loss is the volatile content of fuel, excess air coefficient in stove, the air temperature and current of burner hearth it is mixed Situations such as conjunction.Incomplete combustion loss：Fuel is in hearth combustion, usually some solid combustible, because wind coal It is more inaccurate than adjusting, cause slag ash phosphorus content exceeded, fraction solids combustible is then fallen in ash bucket drains with lime-ash, A part of heat that the lime-ash of row into high-temperature discharges out of the furnace and taken away.Radiation loss：Boiler controller system is exposed to the gold in air Belong to structure, furnace wall flue etc., outwardly air dispersed heat is radiation loss.This loss and the external surface area of boiler controller system Size, insulation and adiabatic condition have direct relation.Flying dust heat loss and body of heater radiation loss：Fuel is in hearth combustion, usually Some solid combustible and flying dust are carried over outside stove together, and carry-over loss is that the most important machinery of boiler does not fire completely Scaling loss is lost, and causes discharge pm2.5-10 series goods and materials exceeded.Property, coal dust moisture fineness, the fire box temperature of this and fuel, boiler Load and furnace air dynamic condition etc. all have a strong impact on that this loses.

In order to improve the efficiency of combustion of coal-burning boiler, therefore it is proposed that a kind of flue gas and flying dust second-time burning heat recovery Method and apparatus.

Utility model content

Based on technical problem existing for background technology, the utility model proposes a kind of flue gas and flying dust second-time burning heat Recovery method and device.

The utility model proposes a kind of flue gas and flying dust second-time burning heat reclaim unit, including boiler body is described The right-hand member of boiler body is connected with burner by connecting tube, and the top side of the burner by pipeline by being connected Methanol storing unit, and the exit of methanol storing unit is provided with control valve, the top opposite side of the burner passes through Pipeline is connected with oxygen-enriched generator equipment, and the escape pipe of oxygen-enriched generator equipment is provided with oxygen-enriched control valve, the oxygen-enriched hair The left end of raw device equipment is provided with electronic lighter, and electronic lighter is interspersed in the inner chamber of burner, the combustion The inner cavity top for burning device is provided with concentration sensor, and the inwall of the burner is provided with water screen tube, and water screen tube Circulate and connect with the return water system of boiler body, the right end side of the burner is provided with control panel, the chain of command Plate is electrically connected with by wire and oxygen-enriched control valve, control valve and electronic lighter respectively.

Preferably, the outer wrap of the burner has insulated wall.

Preferably, the insulated wall includes thermal insulation mortar, insulation foam plate and ceramic thermal insulation plate, the ceramic thermal insulation plate Outside pressing have insulation foam plate, and thermal insulation mortar is provided with the outside of insulation foam plate.

Preferably, the arrangement mode of the water screen tube arranges for W types.

Preferably, the heat power of the burner is equal to the 5%-10% of the heat power of boiler.

Beneficial effect in the utility model：

1st, the utility model installs a burner additional by the afterbody in boiler body, according to the power of boiler body The power (flue gas monoxide and flying dust take away 5%-10% or so heats) of 5%-10% designed combustion devices, effectively solves pot Internal thermal loss in stove.

2nd, the utility model is carried out abundant by using methanol atomization foaming in burner with monoxide and flying dust Mixing, enwrapped granule thing, then by being filled with oxygen-enriched carry out ignition, the material in abundant burner hearth, improve the combustion of boiler Efficiency is burnt, increases calory burning.

3rd, the utility model is connected by being provided with water screen tube in burner with the backwater circulation system in boiler, is filled Point utilize heat transfer, reduce thermal loss, while by outer wrap insulated wall, reducing the loss of heat, raising work Efficiency.

4th, the utility model reduces smoke evacuation band thermal loss, makes gas completely burned hot, while reduces boiler radiating damage Lose, flue gas reduces heat loss with the secondary fully burning of flying dust, mitigates desulfurization and dedusting denitration device operation burden, improves using energy source Rate, reach and economize on resources, reduce the purpose of discharge, operating efficiency is high, economizes on resources.

Brief description of the drawings

Fig. 1 is the structural representation that utility model proposes.

In figure：It is 1 boiler body, 2 burners, 3 methanol storing units, 4 control valves, 5 oxygen-enriched generator equipment, 51 oxygen-enriched Control valve, 6 electronic lighters, 7 concentration sensors, 8 control panels, 9 insulated walls, 10 water screen tubes.

Embodiment

The utility model is made with reference to specific embodiment further to explain.

A kind of flue gas and flying dust second-time burning heat reclaim unit, including boiler body 1, the right-hand member of the boiler body 1 Burner 2 is connected with by connecting tube, the top side of the burner 2 connects methanol device 3, and methanol by pipeline The exit of device 3 is provided with control valve 4, and the top opposite side of the burner 3 is connected with oxygen-enriched generator by pipeline Equipment 5, and the escape pipe of oxygen-enriched generator equipment 5 is provided with oxygen-enriched control valve 51, the left end of the oxygen-enriched generator equipment 5 is set Electronic lighter 6 is equipped with, and electronic lighter 6 is interspersed in the inner chamber of burner 2, the inner chamber of the burner 2 Top is provided with concentration sensor 7, and the inwall of the burner 2 is provided with water screen tube 10, and water screen tube 10 and boiler The return water system circulation connection of body 1, the arrangement mode of the water screen tube 10 arrange for W types, the right-hand member of the burner 2 Side is provided with control panel 8, and the control panel 8 passes through wire and oxygen-enriched control valve 51, control valve 4 and electronic striking respectively Device 6 is electrically connected with.

The outer wrap of the burner 2 has an insulated wall 9, the insulated wall 9 include thermal insulation mortar, insulation foam plate, With ceramic thermal insulation plate, the outside pressing of the ceramic thermal insulation plate has insulation foam plate, and guarantor is provided with the outside of insulation foam plate Warm mortar, the heat power of the burner 2 are equal to the 5%-10% of the heat power of boiler, and the utility model reduces row Cigarette band thermal loss, makes gas completely burned hot, while reduces boiler radiation loss, and flying dust, which fully burns, reduces heat loss, work Make efficiency high, economize on resources.

A kind of flue gas and flying dust second-time burning heat recovery method and device, specific method step are as follows：

S1：After boiler body 1 burns, the afterbody of flue gas and flying dust from boiler body 1 after burning enters burner 2 In；

S2：Start control panel 8, control valve 4 is opened, and the methanol in methanol storing unit 3 enters inside burner hearth, using first Alcohol atomization foaming, is sufficiently mixed, enwrapped granule thing with flue gas and flying dust；

S3：Oxygen is filled, control panel 8 opens oxygen-enriched control valve 51, and the oxygen in oxygen-enriched storing unit 5 blasts burner hearth, The oxygen amount needed according to burning, is filled with oxygen-enriched, and the oxygen-enriched particulate matter with S2 is sufficiently mixed；

S4：Electronic lighter 6, oxygen-enriched, the progress oxygen-enriched combusting for the needs that burn are opened, while is entered with enwrapped granule thing Row burning, flue gas and the flying dust burning entered from boiler body 1, oxygen-enriched inserting reduce 41.38% cold air, reached Fully burning；

S5：Substantial amounts of heat is produced after burning, supplies boiler body 1, while when flue gas volume increases or reduces, it is dense 7 information transmissions detected of sensor are spent to control panel 8, control the opening and closing of oxygen-enriched control valve 51, adjust automatically Oxygen-enriched increase or reduction, reach coordinated operation；

S6：The return water system circulation of water screen tube 10 and boiler body 1 is connected, while insulated wall is installed outside burner 2 9, it is incubated, reduces the lost speed of heat.

S7：After flue gas and flying dust burning, flue gas particles total amount is decreased obviously, and rate of descent reaches 80%, is carried out down together Process.

It is described above, the only preferable embodiment of the utility model, but the scope of protection of the utility model is not This is confined to, any one skilled in the art is in the technical scope that the utility model discloses, according to this practicality New technical scheme and its utility model design are subject to equivalent substitution or change, should all cover in protection model of the present utility model Within enclosing.

Claims

1. a kind of flue gas and flying dust second-time burning heat reclaim unit, it is characterised in that：Including boiler body, the boiler body Right-hand member burner is connected with by connecting tube, the top side of the burner passes through pipeline and connects methanol storage dress Put, and the exit of methanol storing unit is provided with control valve, the top opposite side of the burner is connected with by pipeline Oxygen-enriched generator equipment, and the escape pipe of oxygen-enriched generator equipment is provided with oxygen-enriched control valve, the oxygen-enriched generator equipment Left end is provided with electronic lighter, and electronic lighter is interspersed in the inner chamber of burner, the burner it is interior Top of chamber is provided with concentration sensor, and the inwall of the burner is provided with water screen tube.

2. a kind of flue gas according to claim 1 and flying dust second-time burning heat reclaim unit, it is characterised in that the combustion The outer wrap for burning device has insulated wall.

3. a kind of flue gas according to claim 2 and flying dust second-time burning heat reclaim unit, it is characterised in that the guarantor Warm wall includes thermal insulation mortar, insulation foam plate and ceramic thermal insulation plate, and the outside pressing of the ceramic thermal insulation plate has insulating foam Plate, and thermal insulation mortar is provided with the outside of insulation foam plate.

4. a kind of flue gas according to claim 1 and flying dust second-time burning heat reclaim unit, it is characterised in that the water The arrangement mode of cold wall pipe arranges for W types.

5. a kind of flue gas according to claim 1 and flying dust second-time burning heat reclaim unit, it is characterised in that the combustion Burn 5%-10% of the heat power equal to the heat power of boiler of device.