CN2319769Y

CN2319769Y - Needle like radiation heat exchanger

Info

Publication number: CN2319769Y
Application number: CN 98211139
Authority: CN
Inventors: 马贺军; 张宝红
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-01-04
Filing date: 1998-01-04
Publication date: 1999-05-19
Anticipated expiration: 2008-01-04

Abstract

The utility model relates to a needle-shaped radiation heat exchanger. One end of a heat preservation box body is fixed with exhaust gas and a secondary air inlet pipe, and the other end is provided with an air outlet; both ends in the box body are respectively provided with a main cold, hot air pipe whose one end extends out the box body; a plurality of rows of needle-shaped heat exchange pipes in snake shapes are arranged between the main cold, hot air pipes; the snake-shaped space of the heat exchange pipes is provided with fireproof partition walls. A plurality of heat radiating needles are arranged on the outer walls of the needle-shaped heat exchange pipes, and a plurality of inner heat radiating ribs are arranged on the inner walls. The heat exchanger has large heating coefficient, high thermal efficiency, and can be widely used for the utilization of waste heat.

Description

The needle-like radiation recuperator

The utility model belongs to a kind of heat exchanger, the hot blast needle-like radiation recuperator that particularly a kind of casting industry is used.

At present, the hot blast heat exchanger used of casting industry has needle-like heat exchanger, tubular exchanger, radiation recuperator.The needle-like heat exchanger only is divided into again has the single face pin heat exchanger tube of pin and the heat exchanger of the two-sided pin heat exchanger tube formation that the inside and outside wall of pipe all has pin at tube wall.The needle-like heat exchanger has improved heat transfer coefficient, thermal efficiency height.But use through long-term, dust deposit, easy-clear not, particularly two-sided needle tubing, thus influenced heat transfer efficiency.

Tubular exchanger is made up of common steel tube and heat resisting pipe, and heat resisting pipe is by the adverse current setting, and furnace gas vertically flows, and air flows in pipe.This heat exchanger air-tightness is higher, makes simply, and is less along amassing at the dust of tube surface, but heating surface area is little, and heat transfer efficiency is low.

Radiation recuperator is made up of different inside and outside two concentric tubes of diameter, on the outer wall of inner tube blade can be arranged.High-temp waste gas flows in interior pipe, flows in the interlayer of cold air between inner and outer pipe, makes the cold air heating by the radiant heat transfer mode like this.This heat exchanger heat transfer coefficient is bigger, and heat exchange efficiency is higher.But it can only use under the quite high situation of EGT.

The purpose of this utility model is to overcome weak point of the prior art and provides a kind of heat transfer coefficient big, the heat transfer efficiency height, and dust is difficult for deposition, the needle-like radiation recuperator of long service life.

The purpose of this utility model can realize by following measure:

The structure of needle-like radiation recuperator is to install mixture pipe (2) at an end that is incubated casing (1), the other end has gas outlet (3), the other end of mixture pipe (2) is installing waste gas inlet pipe (4), on the waste gas inlet pipe, installing auxiliary air blast pipe (5) and auxiliary air bellows (6), it is the combustion chamber that insulation casing interior (7) is located, hot-blast main (8) and the cold wind house steward (9) that the one end stretches out the insulation casing adorned at two ends respectively in the casing, between hot-blast main and cold wind house steward, adorn number row and be snakelike needle-like heat exchanger tube (10), the heat exchanger tube sweep is circular arc, is adorning fire-resisting partition (11) in the snakelike space of heat exchanger tube.

The structure of needle-like heat exchanger tube is to install several heat radiation pins (12) on the outer wall of pipe, is installing radiation rib in several pieces (13) on tube inner wall.

The utility model compared with prior art has following advantage:

Since adopted add the heat radiation pin, in the heat exchanger tube of radiation rib, the heating surface area of its pipe is strengthened, the eddy current of gas is strengthened, thereby has improved the heat transfer heat transfer coefficient, the heat transfer efficiency height.

2. owing to taked the heat exchange of radiant heat transfer mode, the big EGT height of needle tubing diameter has bigger heat transfer coefficient, the heat transfer efficiency height.If EGT is 1000～1300 ℃, cold air can be preheating to 800～1100 ℃, if EGT is 450～600 ℃, cold air can be preheating to 300～450 ℃

3. owing to adopt snake type cast tube, the arc transition of elbow garden can produce buffering to thermal expansion, and the protection cast tube is not fragile, and the preheated air pressure loss is little.

4. waste gas is earlier through dry method dust, because waste gas snakelike mobile flow velocity in heat exchanger is bigger, it is long-pending that fine solid particle is difficult for dirt, exempted clear dirt, ensured heat-transfer effect.

The drawing of accompanying drawing is described as follows:

Fig. 1 is a needle-like radiation recuperator structural representation;

Fig. 2 is Figure 1A-A profile;

Fig. 3 is Figure 1B-B profile;

Fig. 4 is a needle-like radiating tube part sectioned view;

Fig. 5 is Fig. 4 C-C profile;

Fig. 6 is Fig. 4 D-D profile;

Below in conjunction with accompanying drawing the utility model embodiment is described in further detail:

The structure of needle-like radiation recuperator such as Fig. 1. Fig. 2. shown in Figure 3, be to install mixture pipe (2) at an end that is incubated casing (1), the other end has gas outlet (3), the other end of mixture pipe (2) is installing waste gas inlet pipe (4), on the waste gas inlet pipe, installing auxiliary air blast pipe (5) and auxiliary air bellows (6), it is the combustion chamber that insulation casing interior (7) is located, hot-blast main (8) and the cold wind house steward (9) that the one end stretches out the insulation casing adorned at two ends respectively in the casing, between hot-blast main and cold wind house steward, adorn 6 rows and be snakelike needle-like heat exchanger tube (10), the heat exchanger tube sweep is circular arc, is adorning fire-resisting partition (11) in the snakelike space of heat exchanger tube.

The structure of needle-like heat exchanger tube such as Fig. 4. Fig. 5. shown in Figure 6, be on the outer wall of pipe, to install several heat radiation pins (12), on tube inner wall, installing radiation rib in several pieces (13).

During use, furnace cupola or blast furnace come out contains higher CO waste gas, behind dry method dust, enter from low temperature waste gas inlet pipe (4), air enters from auxiliary air bellows (6) and auxiliary air blast pipe (5), and air and low temperature waste gas mix at mixing tube, at the air inlet place through lighting (7) internal combustion in the combustion chamber, adverse current in the insulation casing then, and flow along fire-resisting partition is snakelike, flow out (3) from the gas outlet.Cold air enters needle-like heat exchanger tube (10) from cold air house steward (9), along managing snakelike hot-blast main (8) outflow that flows to.In this process, the needle-like heat exchanger tube is given in the waste-gas heat radiation, and the needle-like heat exchanger tube is given cold air in the pipe with heat radiation again, thereby makes the cold air heating.

Claims

1. needle-like radiation recuperator, be in the insulation casing, to adorn the needle-like heat exchanger tube, it is characterized in that: an end of insulation casing (1) is installing mixture pipe (2), the other end has gas outlet (3), the other end of mixture pipe (2) is installing waste gas inlet pipe (4), on the waste gas inlet pipe, installing auxiliary air blast pipe (5) and auxiliary air bellows (6), it is the combustion chamber that insulation casing interior (7) is located, hot-blast main (8) and the cold wind house steward (9) that the one end stretches out the insulation casing adorned at the two ends of casing respectively, between hot-blast main and cold wind house steward, adorn number row and be snakelike needle-like heat exchanger tube (10), the sweep of heat exchanger tube is circular arc, is adorning fire-resisting partition (11) in the snakelike space of heat exchanger tube.

2. according to the said needle-like radiation recuperator of claim 1, it is characterized in that: the structure of needle-like heat exchanger tube is to install several heat radiation pins (12) on the outer wall of pipe, is installing radiation rib in several pieces (13) on tube inner wall.