CN205579616U

CN205579616U - Gas boiler hangs down nitrogen air preheater

Info

Publication number: CN205579616U
Application number: CN201620302467.6U
Authority: CN
Inventors: 李涛
Original assignee: Beijing Senneng Technology Co Ltd
Current assignee: Beijing Senneng Technology Co Ltd
Priority date: 2016-04-12
Filing date: 2016-04-12
Publication date: 2016-09-14
Anticipated expiration: 2026-04-12

Abstract

The utility model provides a gas boiler hangs down nitrogen air preheater, include: heat absorption evaporation plant (1), gas boiler (2), flue gas condenser (3) and pot boiler burner (4). The advantage does: (1 ) gas boiler hangs down nitrogen air preheater constitutes simple structure, low cost and easy maintenance by traditional gas boiler, heat absorption evaporation plant, flue gas condenser, (2 )This device makes it become and preheats humid air with preheating of air and humidification in the heat absorption evaporimeter, because the air contains certain moisture, after humid air got into pot boiler burner, combustion temperature can keep 900 DEG C of left and right sides in the furnace, produced few NOx under this temperature to greatly reduced NOx's emission, the minimum 15ppm that reaches satisfies the environmental protection requirement, (3 )Can this device gas boiler's the thermal efficiency reach 96% 99%, not only energy -conservation but also low nitrogen emission.

Description

Gas fired-boiler low nitrogen air preheater

Technical field

This utility model belongs to air preheat technical field, is specifically related to a kind of gas fired-boiler low nitrogen air preheat Device.

Background technology

The air preheater of gas-fired Boiler System is the heat burner utilizing boiler tail high-temperature flue gas Room temperature combustion air, while reducing afterbody exhaust gas temperature, improves the temperature of combustion air, thus improves combustion The heat-exchange device of fuel economy.

But, the air preheater of existing gas-fired Boiler System is primarily present following deficiency: (1) is due to sky Combustion gas is not sufficiently combusted, and therefore, boiler oxynitride discharge amount does not meets concerned countries standard, thus right Environment affects；(2) thermal conductivity between gas is relatively low, it is impossible to more effectively heat exchange；(3) The volume of air preheater is relatively big, needs the flue arranged longer, thus add system cost in system.

Utility model content

The defect existed for prior art, this utility model provides a kind of gas fired-boiler low nitrogen air preheat dress Put, can effectively solve the problems referred to above.

The technical solution adopted in the utility model is as follows:

This utility model provides a kind of gas fired-boiler low nitrogen air preheater, including: heat absorption evaporator (1), Gas fired-boiler (2), flue gas condenser (3) and boiler-burner (4)；

Described heat absorption evaporator (1) includes heat absorption evaporation housing (1-1), described heat absorption evaporation housing (1-1) Inner chamber in the middle part of be disposed with the 1st filler (1-2)；The bottom of described heat absorption evaporation housing (1-1) offers into sky QI KOU (1-3) and row's cold water outlet (1-4)；The top of described heat absorption evaporation housing (1-1) offers pre-upsurge Humid air outlet (1-5) and enter warm water mouth (1-6)；

Described flue gas condenser (3) includes flue gas condensing housing (3-1), described flue gas condensing housing (3-1) Inner chamber in the middle part of be disposed with the 2nd filler (3-2)；The bottom of described flue gas condensing housing (3-1) offers into cigarette QI KOU (3-3) and row's warm water mouth (3-4)；The top of described flue gas condensing housing (3-1) offers into cold water Mouth (3-5) and exhaust smoke outlet (3-6)；

The air scoop (1-3) that enters of described heat absorption evaporator (1) connects with outside air；Described heat absorption evaporation The warm water mouth (1-6) that enters of device (1) connects with row's warm water mouth (3-4) of described flue gas condenser (3)； Row's cold water outlet (1-4) of described heat absorption evaporator (1) enters cold water outlet with described flue gas condenser (3) (3-5) connection；Described heat absorption evaporator (1) pre-hot humid air outlet (1-5) is communicated to described The air inlet (4-1) of boiler-burner (4)；The exhaust smoke outlet (2-3) of described gas fired-boiler (2) and institute That states flue gas condenser (3) enters flue gas mouth (3-3) connection；The exhaust smoke outlet of described flue gas condenser (3) (3-6) connect with external environment.

Preferably, described gas fired-boiler (2) is communicated with boiler heat output channel (2-2) and boiler replenishing water pipe Road (2-1).

The gas fired-boiler low nitrogen air preheater that this utility model provides has the advantage that

(1) gas fired-boiler low nitrogen air preheater is by traditional gas fired-boiler, heat absorption evaporator, flue gas Condenser forms, simple in construction, with low cost and easy care；

(2) this device heat absorption vaporizer in by air preheat and humidification so that it is become pre-hot humid air, Owing to air contains certain moisture, after humid air enters boiler-burner, stove chamber inner combustion temperature is permissible It is maintained at about 900 DEG C, produces few NOx at a temperature of being somebody's turn to do, thus greatly reduce the discharge capacity of NOx, Minimum up to 15ppm, meet environmental requirement.

Accompanying drawing explanation

The structural representation of the gas fired-boiler low nitrogen air preheater that Fig. 1 provides for this utility model.

Detailed description of the invention

In order to make this utility model be solved the technical problem that, technical scheme and beneficial effect clearer, Below in conjunction with drawings and Examples, this utility model is further elaborated.Should be appreciated that herein Described specific embodiment, only in order to explain this utility model, is not used to limit this utility model.

In conjunction with Fig. 1, this utility model provides a kind of gas fired-boiler low nitrogen air preheater, including: heat absorption is steamed Transmitting apparatus 1, gas fired-boiler 2, flue gas condenser 3 and boiler-burner 4；

Heat absorption evaporator 1 includes heat absorption evaporation housing 1-1, is disposed with in the middle part of the inner chamber of heat absorption evaporation housing 1-1 1st filler 1-2；The bottom of heat absorption evaporation housing 1-1 offers into air scoop 1-3 and row cold water outlet 1-4；Heat absorption is steamed The top sending out housing 1-1 offers pre-hot humid air outlet 1-5 and enters warm water mouth 1-6；

Flue gas condenser 3 includes flue gas condensing housing 3-1, is disposed with the 2nd in the middle part of the inner chamber of flue gas condensing housing 3-1 Filler 3-2；The bottom of flue gas condensing housing 3-1 offers into flue gas mouth 3-3 and row warm water mouth 3-4；Flue gas condensing The top of housing 3-1 offers into cold water outlet 3-5 and exhaust smoke outlet 3-6；

Then:

The air scoop 1-3 that enters of heat absorption evaporator 1 connects with outside air；Heat absorption evaporator 1 enter warm water mouth 1-6 connects with the row warm water mouth 3-4 of flue gas condenser 3；The row cold water outlet 1-4 of heat absorption evaporator 1 is cold with flue gas The cold water outlet 3-5 that enters of condenser 3 connects；Heat absorption evaporator 1 pre-hot humid air outlet 1-5 is communicated to boiler combustion The air inlet 4-1 of burner 4；The exhaust smoke outlet 2-3 of gas fired-boiler 2 enters flue gas mouth 3-3 even with flue gas condenser 3 Logical；The exhaust smoke outlet 3-6 of flue gas condenser 3 connects with external environment.

It addition, gas fired-boiler 2 is communicated with boiler heat output channel 2-2 and boiler replenishing water pipeline 2-1.

The operation principle of the gas fired-boiler low nitrogen air preheater that this utility model provides is:

(1) outside air enters into the bottom of heat absorption evaporator 1, and presses at the inner chamber evaporating housing that absorbs heat Direction flowing from bottom to top；Meanwhile, the warm water that flue gas condenser 3 is discharged enters into the top of heat absorption evaporator 1 Portion, and evaporate the inner chamber of housing by the flowing of top-down direction in heat absorption；Therefore, air and warm water are carried out Heat exchange, after air absorbs heat and the humidity of warm water, becomes pre-hot humid air；And warm water becomes cold water；

(2) the pre-hot humid air that step 1 obtains enters boiler-burner 4 and fuel gas buring；Herein, due to Pre-hot humid air contains certain moisture, after humid air enters boiler-burner, in can making boiler furnace Ignition temperature is maintained at about 900 DEG C, produces few nitrogen oxides i.e. NOx, thus reach ring at a temperature of being somebody's turn to do Guaranteed request；

(3), in boiler-burner when pre-hot humid air and fuel gas buring, high-temperature flue gas is produced；High-temperature flue gas Enter the bottom of flue gas condenser, and at the inner chamber of flue gas condenser by the flowing of direction from bottom to top；It addition, The cold water that the heat absorption evaporator of step 1 produces enters the top of flue gas condenser, and in flue gas condenser Chamber is by the flowing of direction from top to bottom；Therefore, high-temperature flue gas and cold water carry out heat exchange, and high-temperature flue gas is through heat release After become low-temperature flue gas, and by the externally discharged environment of the exhaust smoke outlet being arranged at flue gas condenser top；And Cold water becomes warm water after heat absorption, and be back to heat absorption evaporator enter warm water mouth.

The gas fired-boiler low nitrogen air preheater that this utility model provides, has the advantage that

(2) oxynitride refers mainly to NO, NO₂、N₂O、N₂O₃、N₂O₄And N₂O₅Deng compound, NO and NO is mainly generated in boiler combustion process₂Generally both compounds are called oxynitride NOx, it is the N in air₂Generate in high temperature (1000 DEG C more than-1400 DEG C) oxidation.This device is in heat absorption By air preheat and humidification in vaporizer so that it is become pre-hot humid air, owing to air contains certain moisture, After humid air enters boiler-burner, stove chamber inner combustion temperature may remain in about 900 DEG C, this temperature The NOx that lower generation is few, thus greatly reduce the discharge capacity of NOx, minimum up to 15ppm, meet environmental protection Requirement；

(3) energy source of the pre-hot humid air produced in heat absorption vaporizer is in boiler smoke, passes through boiler The heat of flue gas, to air preheat, has energy-conservation effect；It addition, the high-temperature flue gas that boiler-burner produces Enter in smoke condensation device, the cold water heat exchange discharged with heat absorption vaporizer, therefore, utilize flue gas condensing to fill Put the heat absorbing flue gas, improve the efficiency of boiler, up to 96%-99%；And conventional burners reduces nitrogen Oxygen compound is it is generally required to reduce the thermal efficiency of 4%-10%；

(4) this device is less demanding to boiler, and any existing gas fired-boiler all can be installed, transform, and is suitable for Wider；

(5) this device is not belonging to pressure vessel, is connection open configuration, safe and reliable, is not required to monitor, There is advantage easy to use；

(6) all rustless steels of device, can outdoor installation, save space, corrosion-resistant, firm, reliable.

The above is only preferred implementation of the present utility model, it is noted that for the art For those of ordinary skill, on the premise of without departing from this utility model principle, it is also possible to make some improvement And retouching, these improvements and modifications also should regard protection domain of the present utility model.

Claims

1. a gas fired-boiler low nitrogen air preheater, it is characterised in that including: heat absorption evaporator (1), Gas fired-boiler (2), flue gas condenser (3) and boiler-burner (4)；

Gas fired-boiler the most according to claim 1 low nitrogen air preheater, it is characterised in that described Gas fired-boiler (2) is communicated with boiler heat output channel (2-2) and boiler replenishing water pipeline (2-1).