Space design method for steam heat exchanger

Abstract

The invention provides a space design method for a steam heat exchanger. The steam heat exchanger comprises an upper boiler barrel, a lower boiler barrel, an ascending pipe and a descending pipe, wherein the ascending pipe and the descending pipe are connected between the upper boiler barrel and the lower boiler barrel. The steam heat exchanger is characterized in that a current stabilizer is arranged in the ascending pipe and is of a sheet-shaped structure, and the sheet-shaped structure is arranged on the cross section of the ascending pipe; in the flow direction of the fluid in the ascending pipe, a plurality of flow stabilizing devices are arranged in the ascending pipe, the distance from the inlet of the ascending pipe is set as H, the distance between the adjacent flow stabilizing devices is S, S=F1(H), that is, S is a function taking the distance H as a variable, and S' is a first derivative of S, and the following requirement is met: s'<0. The invention provides the design method for the steam heat exchanger with the flow stabilizing devices of a novel structure. According to a boiler designed through the method, a gas phase and a liquid phase are continuously separated ina fluid conveying process, so that vibration and noise are reduced to the maximum extent.

Description

[0001] The present invention is a divisional application with the application date of June 20, 2018, application number 2018106325359, and the title of the invention "a method for designing a steam boiler". Technical field [0002] The present invention is a research and development project commissioned by universities. The invention belongs to the field of steam generation, in particular to a steam heat exchanger, belonging to the field of IPC classification number F22. Background technique [0003] The circuit that receives heat from the furnace and causes the fluid to flow from low to high is called the "up circuit", and the circuit that receives heat and causes the fluid to flow from high to low is called the "down circuit". A circuit is composed of a pipe or a group of pipes. This group of pipes leads from a common point, such as a header or steam drum, and terminates at a common point which is also a header or drum. [0004] In most natural circulation boiler designs, the hea...

AI Technical Summary

Problems solved by technology

The impact phenomenon will cause large noise vibration and mechanical shock, causing damage to the equipment

[0007] A variety of riser devices to solve the above problems have also been designed in the previous application, such as 2017102546447 multi-pipe type, but this kind of device is found in operation, because the pipes are tightly combined, so the space formed between the three pipes A is relatively small, because the space A is formed by the convex arc of three pipes, so most of the space A is narrow, which will make it difficult for the fluid to enter and pass through, resulting in a short circuit of the fluid, which affects the heat exchange of the fluid and cannot play a good role. Steady flow

Simultaneously because the many tubes of above-mentioned structure are combined together, manufacture difficulty

Another example is the 2017102666326 structure. Although this structure solves the fluid short circuit phenomenon, there is a problem that the flow area is greatly reduced, resulting in an increase in flow resistance.

Another example is the ring-shaped flow stabilization device of 2017102949490. In the ring structure, the flow stabilization device adopts a ring structure, which leads to uneven separation of the annulus of the flow stabilization device in the circumferential direction, and because of the ring structure, the positions of the four angles of the annulus Acute angles less than 90 degrees occur, which can cause problems with fluid flow short circuits in the acute angles less than 90 degrees

[0008] In view of the above problems, the present invention improves on the basis of the previous invention, and provides a new steam heat exchanger and its design method, thereby solving the problem of low heat absorption efficiency of the riser

Images