CN2798019Y - High-temp heat-pipe gas-gas heat exchanger - Google Patents

Abstract

The utility model relates to a high-temp heat-pipe gas-gas heat exchanger which is composed of a shell, heat pipes, a partition plate, etc., wherein the heat pipes are arranged by using a vertical arrangement form or a form of having an inclination angle which is not less than 5 DEG with the horizontal plane; the heat pipes on the partition plate in the shell are orderly provided with a high temperature heat pipe, a medium temperature heat pipe and a low temperature heat pipe according to the flow direction of flue gas. The utility model can be widely suitable for various drying apparatuses (spray drying apparatuses, fluidized drying apparatuses, rotation drying apparatuses, tunnel drying apparatuses, chain plate type drying apparatuses, etc.), and can also be used as combustion supporting wind required by the combustion of various preheating fuels and cleaning high-temperature hot wind required by other fields.

Description

High-temperature heat pipe gas-gas heat exchanger

Technical field

The utility model relates to a kind of high-temperature hot air generating means, particularly a kind of gas-gas heat exchanger.

Background technology

At present, the method for industrial generation high-temperature gas generally has following several:

1, electrical heating method, though pollution-free with the method, power consumption is too many, electricity charge costliness.

2, burning coal gas or high-quality light diesel fuel produce high-temperature flue gas, the high-temperature flue gas that this method produced, there are the cigarette ash of some and pernicious gas etc. inevitably, so in some field as the aspects such as drying of food, medicine and high whiteness high-purity material, be to ban use of maybe to use above-mentioned high-temperature flue gas directly to contact with material.

3, industrial shell and tube convection recuperator commonly used produces high-temperature gas at present, and it can carry out indirect heat exchange as thermal source with the flue gas that solid fuel ignition produces.But the hot blast temperature that this class device is produced is low, generally is no more than 350 ℃, and its life-span is short, the exhaust temperature height of flue gas, and heat utilization efficiency is low, and if will strengthen heat exchange area, then equipment volume is too big, and it is many to consume steel, and floor space is big, so be subjected to many restrictions.

4, also have a kind of general heat pipe gas-gas heat exchanger, adopt low temperature and moderate temperature heat pipe, so the hot blast temperature that produces generally is no more than 250 ℃ as heat transfer element.

Summary of the invention

The purpose of this utility model is exactly in order to address the above problem, provide a kind of can reduce the dust stratification clogging, pollution-free, hot blast temperature is high and high-temperature heat pipe gas-to-gas heat exchanger that equipment volume is little.

Technical solution of the present utility model:

A kind of high-temperature heat pipe gas-gas heat exchanger, it is by gas approach interface 1, housing 2, heat pipe 3, fin 4, dividing plate 5 is formed, dividing plate 5 is positioned at housing 2, housing 2 is divided into flue gas chamber and air chamber, heat pipe 3 is installed on the dividing plate 5, some fins 4 are installed in heat pipe 3 outsides, high-temperature heat pipe, moderate temperature heat pipe, Cryo Heat Tube is as heat transfer element, make combined heat pipe exchanger, heat pipe 3 on housing 2 internal partitions 5 by the flow direction that enters housing 2 inner flue gas according to high-temperature heat pipe, moderate temperature heat pipe, the order of Cryo Heat Tube is arranged in order formation, it is characterized in that heat pipe 3 adopts vertical layout or spends arranged in form with inclination angle 〉=5 of horizontal plane.

The utility model can adopt vertical or the tilting structure, and high temperature, middle temperature, three kinds of heat pipes of low temperature are combined according to flue gas flow direction, makes heat exchange efficiency improve greatly, and the pollution-free hot blast temperature that is produced can reach 400-1000 ℃.The utility model is simple in structure, and heat exchange area is big and equipment volume is little, saves steel, reduces floor space, and has overcome the dust stratification clogging, and is safe and reliable.The utility model can be widely used in all kinds of drying equipments (spray-drying, fluidized drying, rotary drying, tunnel drying, chain-plate type drying etc.), also can be used as needed combustion air of all kinds of fuel combustions of preheating and the needed cleaning high-temperature hot-air in other field.

Description of drawings

Fig. 1 is the utility model heat pipe inclination displacement structure schematic diagram.

Fig. 2 is the vertical displacement structure schematic diagram of the utility model heat pipe.

The specific embodiment

As Fig. 1,2, dividing plate 5 of the present utility model is divided into air chamber and flue gas chamber with housing 2, and flue gas and air two fluids are separated, and becomes reverse flow.In the utility model, flue gas enters heat exchanger from gas approach interface 1, and flow through successively high-temperature heat pipe, moderate temperature heat pipe and Cryo Heat Tube.High-temperature heat pipe is to be that working media, stainless steel or other heat resisting steel are shell with liquid metal (potassium, sodium, lithium etc.), the heat pipe that can work in high-temperature flue gas more than 1100 ℃.In, Cryo Heat Tube is that naphthalene or other organic working medium (as biphenyl ether, N-methyl pyrrolidone), water etc. are the heat pipe of shell for working media, ordinary low-carbon steel.Dustiness and the employed working media of inside heat pipe according to flue-gas temperature, flue gas, be welded with the fin of multi-form and specification such as longitudinal fin, hoop fin or helical fin at the outer surface of heat pipe, to reach the increase heat exchange area, the purpose of enhanced heat exchange, minimizing equipment volume.

The fuel that the utility model adopted can be solid fuel (coal or coke), liquid fuel or gaseous fuel, also can quote the flue gas of other kiln, realizes UTILIZATION OF VESIDUAL HEAT IN.High-temperature flue gas enters the mode of the flue gas chamber of heat exchanger shell 2 with radiation and heat convection from high-temperature flue gas import interface 1, the bringing-up section of heating heat pipe 3, make the working media boiling vaporization of inside heat pipe, its steam flow cooling section, carry out heat exchange, will the flow through air of heat pipe 3 of the heat that spreads out of progressively is heated to needed temperature.The high-temperature flue gas high-temperature heat pipe of at first flowing through when flue gas drops to uniform temperature because of heat exchange, in flowing through, Cryo Heat Tube, when dropping to below 200 ℃ at last, is extracted emptyings with smoke induced draught fan out from exhanst gas outlet interface 7 again.Air at room temperature then blasts from air intake 8 with air blast, low, the moderate temperature heat pipe bundle of at first flowing through, the elevated temperature heat of flowing through again tube bank, air themperature is heated to needed temperature gradually, send into spray drying tower as drying medium from high-temperature hot-air outlet 9 at last, or send into burner etc. as combustion air.

When adopting solid fuel, the dustiness of flue gas is higher, because housing 2 of the present utility model is vertical or tilting is settled, and heat pipe and horizontal plane angle 〉=5 degree.4 of fins on the heat pipe 3 adopt longitudinal fin or big spacer ring to fin and helical fin.So just can improve the dust stratification situation effectively.Utilize shoot door 6 to carry out regular deashing (, can carry out regular deashing) again, guarantee normal operation of the present utility model, the dust stratification clogging can not occur if design well from deashing property.

Claims (2)

1, a kind of high-temperature heat pipe gas-gas heat exchanger, it is by import interface (1), housing (2), heat pipe (3), fin (4), dividing plate (5) is formed, dividing plate (5) is positioned at housing (2), housing (2) is divided into flue gas chamber and air chamber, dividing plate (5) is gone up heat pipe (3) is installed, heat pipe (3) outside installing some fins (4), high-temperature heat pipe, moderate temperature heat pipe and Cryo Heat Tube are as heat transfer element, make combined heat pipe exchanger, heat pipe (3) on housing (2) internal partition (5) by the flow direction that enters housing (2) inner flue gas according to high-temperature heat pipe, moderate temperature heat pipe, the order of Cryo Heat Tube is arranged in order formation, it is characterized in that the inclination angle 〉=5 degree arranged in form of heat pipe (3) and horizontal plane.

2, high-temperature heat pipe gas according to claim 1-gas heat exchanger is characterized in that heat pipe (3) adopts vertical layout.