CN201503021U

CN201503021U - Grate type thermal radiation air preheating energy economizer

Info

Publication number: CN201503021U
Application number: CN2009201410188U
Authority: CN
Inventors: 李光; 梁银梅
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-06-30
Filing date: 2009-06-30
Publication date: 2010-06-09
Anticipated expiration: 2019-06-30

Abstract

A grate type thermal radiation air preheating energy economizer is a grate and also an air preheater. A support beam (3) is connected with an outer frame (1) for supporting weights of fuels and the support beam, and a group of slats (2) is mounted inside the outer frame (1) for absorbing thermal radiation of bottom face of combusting fuels and preheating rising air, thereby increasing combustion efficiency and temperature, saving 20%-35% of combustion and increasing ignition performance without maintenance or operation costs and without occupying external space of a furnace.

Description

Grate-type heat radiation air-preheating energy-saving device

Affiliated technical field

The utility model relates to a kind of energy saver that is used for buring solid fuels such as boiler, coal kitchen range and bavin kitchen range with energy equipment, especially can utilize heat radiation that air is carried out preheating, improves efficiency of combustion and ignition temperature, thereby reaches a kind of energy saver of energy-saving effect.

Background technology

Present known cooking stove air preheater is to utilize fume afterheat, through heat exchanger air is carried out preheating, imports the device that participates in burning in the burner hearth again.Such air preheater complex structure, it is big to take up room, and easily carbon deposit is perishable, operation and maintenance expense height, the little cooking stove of centering is inapplicable.

Traditional fire grate is the lattice-shaped ironcasting, and the fire grate height is 10～30 millimeters, and row's bar is wide 15～30 millimeters, and row's interspace is 15～30 millimeters.Fire grate act as support fuel, and for air by falling with lime-ash.During burning, fuel bottom surface temperature is 1000～1200 ℃, and its radiant heat major part directly radiate from the fire grate gap, behind the part heating fire grate, radiate through red-hot fire grate.Cross section, fire grate gap is big more, and radiant heat scatters and disappears also big more.With the fire grate cross section is 300 * 350 millimeters, and the cross section, gap is that 50% of its total cross section is example, and the heat loss through radiation amount is 8～10 kilojoule per seconds.Because air approaches zero to thermal-radiating absorption, makes this part heat not be utilized and slattern.Contact with fire grate when air rises and carry out heat exchange, but owing to heat-transfer surface is very little, 20 ℃ of atmosphere temperature rising less thaies.

Summary of the invention

Big for overcoming traditional burner heat extraction radiation loss, the shortcoming that intake air temperature is low, utilize fume afterheat to carry out heat exchange to cause complex structure for overcoming the conventional air preheater simultaneously, it is big to take up room, easy carbon deposit, perishable, the deficiency that the operation and maintenance expense is high, the utility model provides a kind of heat radiation grate-type heat radiation air-preheating energy-saving device that air is carried out preheating that can effectively utilize the burning bottom surface, improves air themperature, and efficiency of combustion and ignition temperature are improved, reach energy-conservation purpose, have simultaneously and do not take the stove external space, do not produce operating cost, the advantage of Maintenance free.Be particularly useful for medium and small cooking stove.

The technical solution adopted in the utility model is: evenly equidistant in a circle, ellipse or square housing one group of metal row batten is installed, row's bar distance between plates is 10～30 millimeters, thickness is 1～2.5 millimeter, it highly is 80～300 millimeters, row's bar distance between plates is 1: 8～1: 15 with the ratio of height, row's batten be shaped as W shape or waveform, also can be the vertical bar shape.The method of attachment of row's batten and housing also can be mechanical snapping for welding.The vertical or horizontal symmetry of backbar is installed in outside the housing, and its connected mode also can be a mechanical connection for welding.This device is a fire grate, is again air preheater.Because row's bar plate height increases, row's bar sheet separation reduces with the ratio of row's bar plate height, the RADIATION ANGLE COEFFICIENT in the relative subsurface of the heat radiation in aspect gap gap is decreased to 0.05 on the row's of making batten, be that heat radiation has only 5% to scatter and disappear from row's batten subsurface gap, 95% heat radiation is absorbed for arranging batten.The burning surface heat radiation of preheater top is for overflowing emission during burning, the vertical whole surface of row's batten all obtains heat radiation, and is many more apart from the near more heat radiation that obtains of emission source, and row's batten is presented the low temperature field of relative superiority or inferiority, because conduction of heat, make the top heat reach the below, make whole row's bar plate temperature higher, air is under suction function, rise from row's bar sheet separation, and carry out heat convection, and row's batten is cooled, and air is heated.Because row's batten length, height increase with quantity, heat-transfer surface increases to 0.8～3 square metre, and air themperature can reach 160～250 ℃, and preheater also can not burnt out.W shape or corrugated thin row's batten have not only increased heat exchange area but also can utilize its elasticity that preheater is improved the tolerance of thermal shock, can not cause distortion or destroyed, and the weight of whole preheater are between 3～20kg.

The beneficial effects of the utility model are: fuel savings 20%～30%, and improve ignition performance, because no flue gas passes through, no carbon deposit does not have corrosion, Maintenance free, no operating cost, reliable operation.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further specified.

Fig. 1 is the vertical view of first embodiment of the present utility model.

Fig. 2 is Fig. 1 (A-A) cutaway view.

Fig. 3 is the partial enlarged drawing in the lower right corner of Fig. 1.

1. housings among the figure, 2. row's batten, 3. backbar.

The specific embodiment

Among Fig. 1, backbar (3) is walked crosswise symmetry with housing (1) and is connected, and with supporting own wt and weight of fuel, connected mode is welding or mechanical snapping.The two ends of W shape row's batten (2) are connected with housing (1), and an end tie point of each row's batten is at least two, and the arrangement of row's batten should be evenly equidistant, and should be vertical, and connected mode is welding or mechanical snapping.

Claims

1. grate-type heat radiation air-preheating energy-saving device.In circular, oval or square housing, one group of metal row batten is installed, it is characterized in that: 80～300 millimeters of row's bar plate hights, thickness is 1～2.5 millimeter, spacing is 10～25 millimeters between row's batten, evenly distributed, row's bar sheet separation is 1: 8～1: 15 with the ratio of row's bar plate height, and the shape of row's batten is tortuous W shape or vertical bar shape.