Baffle rod type preheater for high-pressure boiler water and chemical reaction device

Abstract

The invention discloses a baffle rod type preheater for high-pressure boiler water. The baffle rod type preheater comprises a shell and a tube plate, wherein the tube plate divides an inner cavity of the shell into a heat exchange cavity and a water cavity; the water cavity is divided into a water inlet cavity and a water outlet cavity which are not communicated with each other; a tube bundle sleeve is arranged in the shell; in the tube bundle sleeve, certain ends of U-shaped heat exchange tubes are communicated with the water inlet cavity through the tube plate, while the other ends of the U-shaped heat exchange tubes are communicated with the water outlet cavity through the tube plate; the shell is connected with a high-pressure external connection box; a communicating part is arranged between the tube bundle sleeve and the tube plate; one end, far away from the tube plate, of the tube bundle sleeve is formed into a high-temperature internal connection box; a gas passage is arranged between the outer wall of the tube bundle sleeve and the inner wall of the shell; a gas entering through a gas inlet can pass through the high-temperature internal connection box, gaps among the U-shaped heat exchange tubes, the communicating part and the gas passage in sequence, and then is discharged from the preheater through a gas outlet. The invention also discloses a chemical reaction device for an exothermal reaction, which is provided with the preheater. The baffle rod type preheater has advantages that the heat stress of the tube plate is less, the maintenance is facilitated, the manufacturing difficulty is low, and the like.

Description

technical field [0001] The invention belongs to the technical field of chemical equipment, and is a waste heat recovery device for a chemical reactor, specifically, a horizontal high-pressure boiler water baffle rod type with low material requirements, low manufacturing cost, easy maintenance, and high thermal efficiency. Preheater. Background technique [0002] At present, the waste heat recovery device after the chemical reaction has been greatly improved. Usually, the high temperature and high pressure are separated, and the form of double casing or triple casing is adopted, and the process gas enters from the inner pipe and exits from the outer casing. Although It separates the high-temperature and high-pressure areas, but because of the multiple casings, it is cumbersome to manufacture and wasteful in material consumption; in addition, the heat exchange efficiency is not high due to the multiple casings. [0003] The heat exchange tubes in traditional waste heat recove...

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Problems solved by technology

[0005] In view of the problems of the existing waste heat recovery device, such as large amount of materials, low heat exchange efficiency, unfavorable maintenance, difficult manufacturing, concentrated heat stress on the tube sheet, and easy cracking of the weld seam between the heat exchange tube and the tube sheet at the hot end, the purpose of this application is first A preheater is provided to at least partially solve the above problems, and the specific technical solutions are as follows:

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