CN201764862U - High temperature heat exchanger - Google Patents

Abstract

The utility model relates to a high-temperature heat exchanger which belongs to the technical field of a heat exchange facility. The heat exchanger is provided with a tank-shaped housing. The middle part of the housing is divided into a high-temperature chamber and an air outlet chamber through a baffle. The upper part is provided with a crown-shaped reflux chamber provided in the housing. The high-temperature chamber is provided with a high-temperature medium inlet. The air outlet chamber is provided with a high-temperature medium outlet. A heat insulation layer is lined at the inner wall of the high-temperature chamber. The top part of the housing is communicated with the reflux chamber through a first group of tubes. The reflux chamber is communicated with the air outlet chamber through a second group of tubes. The middle part of the housing is provided with a peripheral layer which forms a squeezing chamber. The peripheral layer is provided with a cold air inlet. An upper part of the squeezing chamber is communicated with an upper chamber formed between the upper housing and the crown-shaped reflux chamber. The upper chamber is provided with a hot air outlet. The heat exchanger according to the utility model has the following advantages: organic combination of the squeezing chamber and the tube structures, reasonable structure, capacity for bearing the heat exchange medium with a temperature which reaches up to 1200 DEG C, and sufficient heat exchange.

Description

High temperature heat exchanger

technical field

The utility model relates to a heat exchanger, in particular to a high-temperature heat exchanger, which belongs to the technical field of heat exchange facilities.

Background technique

Clamp and tube heat exchangers are commonly used heat exchange facilities in many industries. The Chinese patent application with the application number CN02222477.7 discloses a gas water heater, which mainly consists of a burner, a heat exchanger, a hot water folder, a controller, an air inlet and outlet, and a housing. Its characteristics are: the shape is a cylinder, and the upper and lower ends of the machine support the shell to buckle and fix it and connect it into a closed whole. The inner surface contains a cylindrical hot water folder with a hot water outlet at the lower part, and the upper end and the exhaust gas are exhaled. The tubes are connected, and the lower end is connected with the fresh air inlet tube. A burner and a heat exchanger are installed in the furnace. The heat exchange tube of the heat exchanger spirals upwards, and the upper part is wound in the groove around the impeller-shaped heat exchange fin. The heat exchanger is a sandwich type. And the Chinese utility model patent that the application number is 200910182125.X discloses a kind of combined heat exchange tube shell and tube heat exchanger, comprises the first net plate, tank body, baffle plate, second net plate and heat exchange tube, its It is characterized in that: the tube and tube heat exchanger also includes a sealing plate and a sealing ring, the other end of the heat exchange tube is sealed and welded with a sleeve, the sealing plate is provided with a sealing hole corresponding to the tube hole on the second mesh plate, and the sealing One end of the ring is assembled in the pipe sleeve, and the other end is assembled in the sealing hole; the outer wall of the sealing ring is provided with two annular sealing grooves, and O-rings are installed in the sealing grooves, which respectively seal the outer wall of the sealing ring with the inner wall of the pipe sleeve and the sealing hole; The sealing plate is compressed and fixed by the fastened second mesh plate and the second sealing head.

The basic structure of the sandwich heat exchanger is simple, easy to manufacture, easy to overhaul, large internal volume, single medium flow direction, but large ratio of consumables with the same power. The shell and tube heat exchanger is a more commonly used heat exchanger at present, with a compact structure and a variety of medium flow directions. The same power heat exchange consumes less consumables, but the manufacture is complicated and the maintenance is inconvenient. According to the applicant's understanding, due to the limitation of its own structure, it is difficult to adopt the necessary cooling structure (especially the tubular type), and the general steel is close to its own melting point at about 1000 ° C, so when the temperature of the heat exchange medium reaches about 1000 ° C, this Both heat exchangers are overwhelmed and cannot work continuously.

Utility model content

The purpose of the utility model is to propose a high-temperature heat exchanger capable of withstanding high-temperature medium and capable of sufficient heat exchange through structural improvement to meet the heat exchange requirements of the high-temperature medium.

In order to achieve the above purpose, the high temperature heat exchanger of the present invention has a tank-shaped shell, the middle part of the shell is divided into a high-temperature cavity and an air outlet cavity by a partition, and the upper part has a crown return cavity located in the shell; the high-temperature cavity is opened There is a high-temperature medium inlet, and the air outlet chamber has a high-temperature medium outlet; the inner wall of the high-temperature chamber is lined with a heat-insulating layer, and the top communicates with the return chamber through the first set of tubes; the return cavity communicates with the return cavity through the second set of tubes. The air outlet chamber is connected; the middle part of the housing has a peripheral layer forming a sandwich; the peripheral layer has a cold air inlet, and the upper part of the sandwich communicates with the upper chamber formed between the upper casing and the crown return chamber; The above chamber has a hot air outlet.

The utility model organically combines the clip bin and the column tubes to form a secondary heat exchange structure. The lower part is the sandwich type heat exchange. Taking advantage of the large inner volume of the sandwich type heat exchanger, the inner volume of the high temperature chamber in the sandwich chamber should be enlarged as much as possible, so that it is convenient to set up a heat insulation layer in the high temperature chamber and reduce the temperature of the high temperature chamber. The high temperature radiation suffered by heat-resistant steel solves the problem of heat resistance. When the high-temperature medium enters the high-temperature chamber, the large volume of the high-temperature chamber is used to slow down the flow rate, so that the high temperature can be fully transmitted to the wall of the high-temperature chamber through the heat insulation layer. Low-temperature cold air enters the outer layer from the inlet, and while taking away heat, it reduces the heat received by the heat exchanger shell. The upper part is the main heat exchanger composed of tubes, and the shell of the tube bundle forms the shell side of the heat exchanger. After the first-stage heat exchanged air is output from the lower compartment, it further exchanges heat with the tube bundle to make the cooling The air takes away the heat energy on the tube bundle to the greatest extent, and controls the heating temperature of the tube bundle to ensure the safe use of the heat exchanger. During this process, the high-temperature medium enters from the lower part of the tube bundle, rises to the return cavity, undergoes a self-flow mixing, and then enters the secondary tube-side reflux, so the heat exchange is very sufficient.

A further improvement of the utility model is that the high-temperature chamber has an inclined deflector from the high-temperature medium inlet to the lower end of the first group of tubes, so that the high-temperature medium entering the high-temperature chamber can be effectively guided to the tubes.

A further improvement of the utility model is that the lower part of the housing is a conical ash hopper communicating with the air outlet cavity. In this way, impurities contained in the high temperature medium can be deposited before the heat exchange output.

A further improvement of the utility model is that the high-temperature medium inlet and the inner side of the high-temperature chamber are laid with refractory bricks, thereby preventing the high-temperature gas from directly contacting the steel body of the heat exchanger.

Experiments have proved that the heat exchanger of the utility model organically combines the sandwich chamber and the column tube structure, has a reasonable structure, can withstand heat exchange media with a temperature as high as 1200° C., and has sufficient heat exchange.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described.

Fig. 1 is a structural schematic diagram of an embodiment of the utility model.

FIG. 2 is a side view of FIG. 1 .

FIG. 3 is a top view of FIG. 1 .

Fig. 4 is a cross-sectional view of the tube array in Fig. 1 .

Detailed ways

Embodiment one

The high-temperature heat exchanger of this embodiment is shown in Figures 1 to 4, the middle part of the shell of the tank-shaped shell 1 is divided into a high-temperature chamber 3 and an air outlet chamber 4 by a partition 2, and the upper part has a crown return chamber 5 located in the shell. The high temperature chamber 3 is provided with a high temperature medium inlet 6, and the air outlet chamber 4 is provided with a high temperature medium outlet 7. The inner walls of the high-temperature chamber 3 and the high-temperature medium inlet 6 are lined with refractory bricks as a heat insulation layer, so as to prevent the high-temperature gas from directly contacting the steel body of the heat exchanger. The top communicates with the return cavity 5 through the first set of vertical tubes 8 . The high temperature chamber 3 has an inclined deflector 11 from the high temperature medium inlet 6 to the lower end of the first group of tubes 8 . The return chamber 5 communicates with the air outlet chamber 4 through the second group of tubes 9 . In the middle of the housing there is a peripheral layer 10 forming a cartridge 13 . The peripheral layer 10 has a cold air inlet 12 passing through the bottom of the inclined deflector 11, and the high-temperature medium inlet 6 and its outlet 7 both pass through the clamping chamber 13, so that not only the temperature of the deflector and the inlet and outlet pipe walls of the high-temperature medium can be suppressed , and is conducive to heat transfer. The upper part of the clamp chamber 13 communicates with the upper chamber 14 formed between the upper shell and the crown return chamber 5 through the radial channel adjacent to the tube root. Heat exchange across the input. The side of the upper chamber away from the cold air inlet 12 has a hot air outlet 15 . The lower part of the housing is a conical ash hopper 16 communicating with the air outlet cavity 4 . In this way, impurities contained in the high temperature medium can be deposited before the heat exchange output.

This embodiment takes the following measures to improve high temperature resistance:

1. Lay refractory bricks on the inside of the enlarged heat exchanger intake and high temperature chamber to avoid direct contact of high temperature gas with the steel body of the heat exchanger.

2. It adopts the structure of organic combination of two-stage heat exchange. The lower part is a sandwich heat exchanger. The low-temperature cold air is forcibly input from the surroundings of the inlet pipe of the heat exchanger and the bottom of the high-temperature chamber to take away heat and reduce the heat received by the heat exchanger body. . The upper part is the main heat exchanger, which is composed of vertical steel pipes for heat exchange. The shell of the tube bundle constitutes the shell side of the heat exchanger. After the air is output from the lower clamp, it is cross-cut at the root of the tube bundle and then exchanges heat with the tube bundle, so that the cold air can take away the heat energy on the tube bundle to the greatest extent, and keep the heating temperature of the tube bundle below 1150 ℃ to ensure the safe use of the heat exchanger.

3. The synthetic gas used as the heat exchange medium enters from the lower part of the tube bundle and rises to the top outlet. After a self-flow mixing in the top cavity, it enters the secondary tube pass and flows back out of the tube pass. Since the flow direction of the synthetic gas in the tube is perpendicular to the horizontal plane, and the synthetic gas flowing out from the nozzle is vertically downward, the flow velocity is fast, so that the larger particles of dust entrained in the synthetic gas rush directly to the lower part of the heat exchanger with the inertia of motion. In the ash hopper, the heat exchanger has the effect of gravity dust removal, and the synthetic gas is output from the side pipe.

Claims (8)

1. A high-temperature heat exchanger with a tank-shaped shell, characterized in that: the middle part of the shell is divided into a high-temperature cavity and an air outlet cavity by a partition, and the upper part has a crown return cavity located in the shell; the high-temperature cavity is opened There is a high-temperature medium inlet, and the air outlet chamber has a high-temperature medium outlet; the inner wall of the high-temperature chamber is lined with a heat-insulating layer, and the top communicates with the return chamber through the first set of tubes; the return cavity communicates with the return cavity through the second set of tubes. The air outlet chamber is connected; the middle part of the housing has a peripheral layer forming a sandwich; the peripheral layer has a cold air inlet, and the upper part of the sandwich communicates with the upper chamber formed between the upper casing and the crown return chamber; The above chamber has a hot air outlet. 2. The high-temperature heat exchanger according to claim 1, characterized in that: the high-temperature chamber has an inclined deflector from the high-temperature medium inlet to the lower end of the first group of tubes. 3. The high temperature heat exchanger according to claim 2, characterized in that: the lower part of the shell is a conical dust collecting hopper communicating with the air outlet cavity. 4. The high temperature heat exchanger according to claim 3, characterized in that: the high temperature medium inlet and the inner side of the high temperature chamber are laid with refractory bricks. 5. The high temperature heat exchanger according to any one of claims 2 to 4, characterized in that: the cold air inlet passes through the bottom of the inclined deflector. 6. The high temperature heat exchanger according to claim 5, characterized in that: both the high temperature medium inlet and the high temperature medium outlet pass through the clamp chamber. 7. The high temperature heat exchanger according to claim 6, characterized in that: the upper part of the clamping chamber communicates with the upper chamber through a radial channel adjacent to the root of the tube array. 8. The high temperature heat exchanger according to claim 7, characterized in that: the side of the upper chamber facing away from the cold air inlet is provided with a hot air outlet. the

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