CN201110729Y - A Condenser Suitable for High Pressure Gas (Steam) Body Heating - Google Patents

Abstract

The utility model relates to a condenser suitable for heating high-pressure gas (steam), which belongs to the field of thermal energy and power engineering. It consists of a high-pressure gas (steam) body inlet connection, a cylindrical shell, a pipe box, a high-pressure gas (steam) body outlet connection, a saturated steam inlet connection, a condensate outlet connection, a support, a heat exchange serpentine finned tube and a bypass Flow baffle composition. The high-pressure gas (steam) body scours the heat exchange core body horizontally, is heated by the saturated steam in the heat exchange serpentine finned tube, and then flows out from the medium outlet connection pipe. Compared with traditional condensers, it not only has better heat transfer performance, but also has a more compact and efficient structure, and each set of serpentine finned tubes for heat exchange is arranged longitudinally in the cylindrical shell of the condenser, which can effectively solve the problem of pressure on the traditional condensing heater. The capacity is not high, when the heat exchange tubes are arranged horizontally in the shell, the heated fluid can only wash the heat exchange tubes longitudinally, and the heat exchange effect is poor.

Description

A Condenser Suitable for High Pressure Gas (Steam) Body Heating

Technical field:

The name of the utility model is a condenser suitable for heating high-pressure gas (steam), which belongs to the field of thermal energy and power engineering.

Background technique:

In industrial production processes, heating or cooling is often required, that is, heat transfer. When one fluid is exchanging heat with another fluid and mixing is not allowed, it is called for in a dividing wall heat exchanger. There are many types of partition heat exchangers, among which shell-and-tube heat exchangers are most suitable under medium pressure conditions, and U-shaped tube heat exchangers are generally used under high pressure, which is actually a shell-and-tube heat exchanger. A shell and tube heat exchanger is a condenser if one of the fluids condenses during the heat exchange. Although the shell-and-tube heat exchanger is a universal product, in the heat transfer conditions with different conditions, due to the limitations of its structure, the variability of operating conditions and physical properties of the cold and hot streams, the shell and tube heat exchanger is often Conventional designs of heat exchangers or condensers cannot meet engineering needs.

For a condenser in which a fluid undergoes a phase change for condensation and heating during the heat exchange process, when the heat source is saturated steam, it is generally selected to condense on the shell side of the horizontal condenser, but when the pressure of the condensing medium is high, the tube side is used. Condensation is more suitable. However, when using tube-side condensation, we often face such a problem, that is, when the heated medium is gas (steam), the heat transfer coefficient of tube-side condensation at this time is much greater than the gas (steam) body convective heat transfer coefficient of the shell side. According to the principle of heat transfer, when the heat transfer coefficient of the fluid on both sides of the heat exchanger differs greatly, it is necessary to strengthen the heat transfer on the side of the fluid with a small heat transfer coefficient. For the gas (vapor) body, fins are generally used for strengthening. . If the traditional shell-and-tube heat exchanger structure is adopted, that is, the heat exchange tubes are arranged horizontally in the heat exchanger shell, on the one hand, the fluid will wash the heat exchange tube bundle longitudinally, which is not conducive to heat transfer; on the other hand, even in the shell side It is also inconvenient to install baffles and fins outside the heat exchange tubes. In addition, the traditional condenser shells are mostly square, with limited pressure bearing capacity, and are not suitable for working conditions where the pressure of the heated shell-side medium is high.

The utility model proposes the idea that the heat exchange serpentine finned tubes are longitudinally arranged in the cylindrical shell of the heat exchanger for tube-side condensation heating, which can effectively solve the traditional condenser with low pressure bearing capacity and poor heat transfer performance. and compact structure.

Utility model content:

A condenser suitable for heating high-pressure gas (steam) body proposed by the utility model can be used in some engineering occasions where high-pressure gas (steam) body needs to be heated. The heat exchange serpentine finned tube bundle transfers heat to the gas (steam) body outside the finned tubes, which can not only increase the pressure bearing capacity of the shell side to the greatest extent, but also effectively improve the heat transfer condition of the condenser, that is, in Under the condition of not needing to add baffles, the conventional longitudinal flushing heat exchange tube bundles in the project are changed to horizontal flushing, and at the same time, the finned tubes, which are the earliest and most successful in the process of improving the tubular heat exchange surface, are used to improve the air ( Vapor) body heat exchange is a very effective way to enhance heat transfer. Therefore, the utility model has important significance for the popularization and application of the condenser in some special occasions and energy saving and consumption reduction.

In order to solve the above-mentioned technical problems, a technical scheme of a condenser suitable for high-pressure gas (steam) body heating of the utility model is as follows:

It consists of a high-pressure gas (steam) body inlet connection, a cylindrical shell, a pipe box, a high-pressure gas (steam) body outlet connection, a saturated steam inlet connection, a condensate outlet connection, a support, a heat exchange serpentine finned tube and a bypass A condenser composed of flow baffles suitable for heating high-pressure gas (steam). ) body horizontally scours the heat exchange core, is heated by the saturated steam in the heat exchange serpentine finned tube and then flows out from the medium outlet connection; the saturated steam enters through the saturated steam inlet connection, is condensed in the heat exchange serpentine finned tube The liquid outlet connection pipe flows out; the high-pressure gas (steam) body inlet and outlet connection pipes are respectively located at the upper and lower parts of the left and right sides of the condenser; saturated steam first enters the steam main pipe located at the upper part of the heat exchange serpentine finned tube bundle, and then evenly distributes it to In each group of heat exchange serpentine finned tubes; both ends of the condenser are tube boxes; each group of heat exchange serpentine finned tubes is arranged longitudinally in the cylindrical shell of the condenser, and two adjacent sets of heat exchange serpentine fins The sheet tubes are in a fork row; in order to improve the flow of gas (steam) in the shell side, a side flow baffle is also installed in the shell side of the condenser.

The utility model is characterized in that the heat exchange surface of the high-efficiency finned tube is used to replace the heat exchange surface of the traditional light tube, and each group of heat exchange serpentine finned tubes is longitudinally arranged in the cylindrical shell of the condenser, and the saturated steam passes through a steam The parent tube flows in the finned tube after being evenly distributed. The heated medium can be gas or steam, and the outer fins of the tube are high-frequency welded annular fins. Compared with the traditional condenser, it not only has better heat transfer performance, but also has a more compact and efficient structure, and each group of heat exchange serpentine finned tubes is longitudinally arranged in the cylindrical shell of the condenser, which can effectively solve the problem of traditional condensing heaters. The pressure bearing capacity is not high, when the heat exchange tubes are arranged horizontally in the shell, the heated fluid can only wash the heat exchange tubes longitudinally, and the heat exchange effect is poor.

Description of drawings:

Fig. 1 is a structural diagram of a condenser suitable for high-pressure gas (steam) heating, and Fig. 2 is a projection diagram of directions A and B in Fig. 1 . Among them: 1-high-pressure gas (steam) body inlet connection; 2-cylindrical shell; 3-pipe box; 4-high-pressure gas (steam) body outlet connection; 5-saturated steam inlet connection; 6-condensate outlet connection ; 7-support; 8-heat exchange serpentine fin tube; 9-side flow baffle.

Detailed ways:

Figure 1 also shows the structure of a condenser that uses high temperature and high pressure saturated steam to heat the saturated steam coming out of a heat accumulator.

Saturated steam with a pressure of P=1.2MPa coming out of the heat accumulator enters the heat exchange core body composed of heat exchange serpentine finned tubes 8 through the medium inlet nozzle 1. The saturated steam in the finned tube is heated and then flows out from the medium outlet connecting pipe 4. The high-pressure saturated steam enters through the saturated steam inlet connecting pipe 5, and flows out through the condensate outlet connecting pipe 6 after being condensed in the heat exchange serpentine finned tube. The steam inlet and outlet pipes are respectively located at the upper and lower parts of the left and right sides of the condenser. The high-pressure saturated steam first enters the steam main pipe located on the upper part of the heat exchange serpentine fin tube bundle, and then is evenly distributed to each group of heat exchange serpentine fin tubes. Both ends of the condenser are tube boxes 3 . Each group of heat exchange serpentine finned tubes is longitudinally arranged in the cylindrical shell 2 of the condenser, and the adjacent two groups of heat exchange serpentine finned tubes form a fork row; in order to improve the flow condition of the shell side steam, A bypass baffle is also installed on the shell side of the condenser.

After calculation, when the pressure of the high-pressure saturated steam (condensing medium) is 2.2MPa, the heat exchange area of the condenser is 20m ² (the outer surface area of the bare tube), and the superheated degree of the heated steam outlet can exceed 20°C, which fully meets the engineering process need.

Claims (1)

1. A condenser suitable for high-pressure gas (steam) body heating, consisting of a high-pressure gas (steam) body inlet connection, a cylindrical shell, a pipe box, a high-pressure gas (steam) body outlet connection, a saturated steam inlet connection, Condensate outlet connection pipe, support, heat exchange serpentine finned tubes, and side flow baffles, which are characterized in that the heat exchange surface of high-efficiency finned tubes is used to replace the traditional light pipe heat exchange surface, and each set of heat exchange serpentine fins The finned tubes are arranged longitudinally in the cylindrical shell of the condenser. The saturated steam flows in the finned tubes after being evenly distributed through a steam main tube. The heated medium can be gas or steam. The outer fins of the tubes adopt high-frequency Welding ring-shaped fins; the high-pressure gas (steam) body enters the heat exchange core body composed of heat exchange serpentine fin tubes through the medium inlet pipe, and the high-pressure gas (steam) body laterally washes the heat exchange core body, and is absorbed by the heat exchange serpentine fins. The saturated steam in the sheet tube is heated and flows out from the medium outlet nozzle; the saturated steam enters through the saturated steam inlet nozzle, and flows out from the condensate outlet nozzle after being condensed in the heat exchange serpentine finned tube; the high-pressure gas (steam) body inlet and outlet nozzles They are respectively located at the upper and lower parts of the left and right sides of the condenser; the saturated steam first enters the steam main tube located at the upper part of the heat exchange serpentine fin tube bundle, and then is evenly distributed to each group of heat exchange serpentine fin tubes; the two ends of the condenser It is a tube box; each group of heat exchange serpentine finned tubes is arranged longitudinally in the cylindrical shell of the condenser, and the adjacent two groups of heat exchange serpentine finned tubes form a fork row; in order to improve the shell side gas (steam ) flow conditions of the body, and a bypass baffle is also installed on the shell side of the condenser.

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