KR20000005458U - Multiple condenser system in square header and single evaporator of separate heat pipe heat exchanger - Google Patents

Abstract

The present invention is to construct a heat exchanger by welding a plurality of heat pipe elements by welding the upper and lower headers in a separate heat pipe type heat exchanger. To reduce the steam and condensing lines connecting the condenser and the condenser, inserting a heat pipe element into the inside of the rectangular header and facilitating welding inside the rectangle.

In addition, the system consists of a system that installs multiple condensers in a single evaporation boiler where heating or other heat supply is needed, but does not require a pump, but transfers heat by the latent heat of evaporation of the working fluid. Local heat supply or drying of the flower complex can reduce heat loss by supplying heat only to the heat supply or the part requiring heating without a circulation pump.

Description

Multiple condenser system in square header and single evaporator of separate heat pipe heat exchanger.

The present invention is directed to a multiple condenser system in a square header and a single evaporator of a separate heat pipe heat exchanger.

The arrangement of boilers and hot blast furnaces, which are widely used in industry, is discharged in the form of gas, and when the existing heat exchanger is used to recover the exhaust gas heat, the heat transfer effect on the exhaust gas side is small and the heat transfer area must be increased, thereby increasing the apparatus. There are disadvantages, and if the place where the exhaust gas heat is discharged and the use of the heated hot air is far away, there is a difficult problem to move to the place to use the duct.

Especially in the heat exchanger that handles a large amount of flue gas, the duct production and its associated costs account for a large proportion of the total waste heat recovery cost, and it is the most inconvenient when the conventional economizer type flue gas heat recovery device is applied to a large capacity plant. Urea requires a large duct due to heat exchange between the hot fluid and the cold fluid in the same place, and therefore requires a large area, thereby limiting the arrangement of the exhaust gas heat recovery system.

The separate heat pipe type heat exchanger is capable of transferring heat up to several tens of meters by connecting the evaporator, which is the hot side where the exhaust gas heat contacts, and the condensate, which is the low temperature side that the air supply contacts, with a heat insulation tube. It is an energy saving device that is very easy to recover high temperature waste heat because there is no use of duct.

In addition, because the heat resistance in the pipe is small by moving the heat by latent heat, it is possible to recover up to 60 to 80% of the exhaust gas heat even with a small temperature difference.In the conventional exhaust gas heat recovery device, the heat transfer area is difficult to expand, which causes the device to become large, Since the heat pipe flows to the outside of both sides, it is easy to enlarge the heat transfer area by attaching a fin, so that the size of the device can be reduced to about 1/3, so the supply of exhaust gas heat can be promoted as a recovery device.

The operating principle of this type of separate heat pipe is to inject the working fluid into the closed loop and to vacuum, the working fluid is evaporated in the evaporator even at low temperature, and the working fluid in the vapor state is condensed in the condenser, without the circulation pump Work to transfer heat.

1 is a principle diagram of a split pipe heat exchanger

2 is a square header assembly diagram of a separate heat pipe heat exchanger of the present invention.

Figure 3 is a detailed view of the rectangular header of the present header and the subject innovation

4 is a multiple condenser system in a single evaporator of a separate heat pipe of the present invention.

<Explanation of symbols for main parts of drawing>

(1): evaporator (2): condensation heat exchanger

(3) (3´): Up and down square header of evaporator

(4) (4´): Square header of condenser (5): Steam tube (6): Condenser tube (7): Heat pipe element (8): Cylindrical header (9): Evaporation boiler (10): Condenser (11) : Fuel supply device

In order to achieve the above object it will be described in detail the present invention with reference to the accompanying drawings.

1 shows an overall configuration diagram of a separate heat pipe heat exchanger.

A plurality of heat pipe elements 7 are connected to the upper and lower square headers 3 and 3 'by welding to form a condensation heat exchanger 2 and an evaporator 1, and the condensation heat exchanger 2 is also an evaporator. (5) The square headers 4 and 4 'are constructed in the same manner.

The steam pipe 5 and the condenser tube 6 are connected to the evaporator and the condenser to form a single closed loop split heat pipe heat exchanger, and the single closed loop split heat pipe heat exchanger is divided into several as shown in FIG. It will be used in combination.

However, when the heat pipe element is connected by the conventional cylindrical header 8 of FIG. 3, the heat pipe element 7 may be connected to only one or two rows of headers. Since the hole to be welded in the direction of the diameter of the cylindrical header is large, there is a disadvantage that the welding is difficult and takes a lot of manufacturing cost.

Therefore, in the present design, the square header 3 of the evaporator may be squared instead of the cylindrical, and the two or three rows may be connected in a triangular array to one header, and a plurality of such heat exchangers may be used in combination according to the required capacity. It was made. The advantage is that the number of heat exchangers consisting of one closed loop can be reduced by one third and the number of steam pipes 5 and condensation pipes 6 connecting the evaporator and condenser can be reduced by one third.

In the case of welding heat pipe element to the square header, it is made in the form of a hole in accordance with the required number of heat and arrangement to insert the heat pipe element inside the rectangle, and easily welded inside the rectangle. There is an advantage that can be facilitated.

The device of the present invention as described above is configured as a system for installing a plurality of condenser 10 in a single evaporation boiler (9) having a fuel supply device 11 of FIG. Since the heat is transferred by the latent heat of evaporation of the working fluid, the amount of circulating water can be greatly reduced, and energy saving effect can be expected by a heat supply without a separate tank and a net mixing pump. In addition, the advantage of such a supply system is that heat is supplied only to the heat supply or the part that requires heating, so that local heat supply or drying of the flower complex can reduce heat loss.

The present invention is to construct a heat exchanger by welding a plurality of heat pipe elements by welding the upper and lower headers in a separate heat pipe type heat exchanger. To reduce the steam and condensing lines connecting the condenser and the condenser, inserting a heat pipe element into the inside of the rectangular header and facilitating welding inside the rectangle.

In addition, the system consists of a system that installs multiple condensers in a single evaporation boiler where heating or other heat supply is needed, but does not require a pump, but transfers heat by the latent heat of evaporation of the working fluid. Local heat supply or drying of the flower complex can reduce heat loss by supplying heat only to the heat supply or the part requiring heating without a circulation pump.

Claims (2)

Separate heat pipes characterized by reducing the number of heat exchangers and the number of steam and conduit tubes by welding the elements of the heat pipe to two or three rows of headers, with the upper and lower headers of the evaporator and condenser instead of a cylinder. Square header of heat exchanger. A system of multiple condensers in a single evaporation boiler, characterized in that the installation system is installed in a single evaporation boiler where a number of condensers are required for heating or other heat supply.